NAIMMCQ: August 2016

Archive for August 2016

Which one of the following combinations cannot produce a buffer solution?

Which one of the following combinations cannot produce a buffer solution? a. HNO2 and NaNO2 b. HCN and NaCN c. HClO4 and NaClO4 d. NH3 and (NH4)2SO4 e....

What is the pH of a solution containing aqueous ammonia and ammonium nitrate in a molar ratio of 5.0 to 3.0?

What is the pH of a solution containing aqueous ammonia and ammonium nitrate in a molar ratio of 5.0 to 3.0? a. 4.52 b. 4.96 c. 9.04 d. 9.26 e. 9.48 Answer:...

What is the pH of a solution that is 0.30 M in aniline, C6H5NH2, and 0.15 M in anilinium chloride, C6H5NH3+Cl-? Aniline ionizes as follows. C6H5NH2 + H2O C6H5NH3+ + OH-

What is the pH of a solution that is 0.30 M in aniline, C6H5NH2, and 0.15 M in anilinium chloride, C6H5NH3+Cl-? Aniline ionizes as follows.C6H5NH2 +...

What is the pH of a solution that is 0.080 M in aqueous ammonia and 0.040 M in NH4Cl?

What is the pH of a solution that is 0.080 M in aqueous ammonia and 0.040 M in NH4Cl? a. 2.92 b. 4.44 c. 7.00 d. 9.56 e. 11.08 Answer:...

What is the [H3O+] of a solution that is 0.010 M in aqueous NH3 and 0.030 M in NH4NO3?

What is the [H3O+] of a solution that is 0.010 M in aqueous NH3 and 0.030 M in NH4NO3? a. 7.2 × 10^-6 M b. 6.0 × 10^-6 M c. 1.7 × 10^-9 M d. 1.4...

A solution that is 0.20 M in NH3 is also 0.30 M in NH4Cl. What is the [OH-] in this solution?

A solution that is 0.20 M in NH3 is also 0.30 M in NH4Cl. What is the [OH-] in this solution? a. 4.5 × 10^-6 M b. 1.2 × 10^-5 M c. 7.4 × 10^-5 M d....

What is the pH of an aqueous solution containing CH3COOH and NaCH3COO in a molar ratio of 4.0 to 1.0?

What is the pH of an aqueous solution containing CH3COOH and NaCH3COO in a molar ratio of 4.0 to 1.0? a. 4.37 b. 4.14 c. 9.25 d. 5.35 e. 4.74 Answer:...

A solution is made by combining 500 mL of 0.10 M HF with 300 mL of 0.15 M NaF. What is the pH of the solution?

A solution is made by combining 500 mL of 0.10 M HF with 300 mL of 0.15 M NaF. What is the pH of the solution? a. 2.97 b. 3.10 c. 3.19 d. 3.22 e....

Calculate the pH of 500. mL of 0.100 M acetic acid, CH3COOH, which also contains 0.100 mole of sodium acetate, NaCH3COO.

Calculate the pH of 500. mL of 0.100 M acetic acid, CH3COOH, which also contains 0.100 mole of sodium acetate, NaCH3COO. a. 4.77 b. 5.05 c. 5.32 d....

What is the pH of a 0.22 M HOCN solution containing 0.44 M NaOCN?

What is the pH of a 0.22 M HOCN solution containing 0.44 M NaOCN? a. 3.10 b. 3.16 c. 3.46 d. 2.80 e. 3.77 Answer:...

What is the pH of a solution that is 0.20 M in HCN and 0.15 M in KCN?

What is the pH of a solution that is 0.20 M in HCN and 0.15 M in KCN? a. 7.60 b. 8.40 c. 8.80 d. 9.27 e. 10.10 Answer:...

What is the pH of a solution which is 0.0400 M in formic acid, HCO2H, and 0.0600 M in sodium formate, NaHCOO?

What is the pH of a solution which is 0.0400 M in formic acid, HCO2H, and 0.0600 M in sodium formate, NaHCOO? a. 3.92 b. 3.96 c. 4.00 d. 9.52 e....

Calculate the pH of a solution that is 0.15 M in HOCl and 0.25 M in NaOCl.

Calculate the pH of a solution that is 0.15 M in HOCl and 0.25 M in NaOCl. a. 7.23 b. 8.28 c. 8.06 d. 7.68 e. 9.10 Answer:...

Calculate the pH of a solution that is 0.20 M in sodium hypobromite and 0.10 M in hypobromous acid.

Calculate the pH of a solution that is 0.20 M in sodium hypobromite and 0.10 M in hypobromous acid. a. 4.15 b. 4.45 c. 8.60 d. 8.90 e. 8.30 Answer:...

Calculate the [H3O+] of a solution that is 0.20 M in HF and 0.10 M in NaF.

Calculate the [H3O+] of a solution that is 0.20 M in HF and 0.10 M in NaF. a. 3.2 × 10^-4 M b. 4.0 × 10^-6 M c. 1.4 × 10^-3 M d. 6.3 × 10^-5 M e....

What is the [H3O+] of a solution that is 0.0100 M in HOCl and 0.0300 M in NaOCl?

What is the [H3O+] of a solution that is 0.0100 M in HOCl and 0.0300 M in NaOCl? a. 2.14 × 10^-7 M b. 1.45 × 10^-7 M c. 7.41 × 10^-8 M d. 2.29 ×...

The pH of a 0.03 M formic acid (HCOOH) solution is 2.63. If 0.03 M sodium formate (NaHCOO) is added, which of the following statements is true?

The pH of a 0.03 M formic acid (HCOOH) solution is 2.63. If 0.03 M sodium formate (NaHCOO) is added, which of the following statements is true? a....

When a solution of weak electrolyte is altered by adding one of its ions from another source, the ionization of the weak electrolyte is suppressed. This behavior is termed the ____.

When a solution of weak electrolyte is altered by adding one of its ions from another source, the ionization of the weak electrolyte is suppressed....

A(n) ____ solution contains a conjugate acid-base pair with both the acid and the base in reasonable concentrations.

A(n) ____ solution contains a conjugate acid-base pair with both the acid and the base in reasonable concentrations. a. saturated b. electrolytic c....

At 0.50 atm and 60K, F2 is a:

At 0.50 atm and 60K, F2 is a: a. solid b. liquid c. gas Answer:...

What is the normal boiling point temperature of F2?

What is the normal boiling point temperature of F2? a. 53.4 K b. 53.5 K c. 85.0 K d. 144.1 K Answer:...

The densest phase of F2 is a

The densest phase of F2 is a a. solid b. liquid c. gas Answer:...

What is the densest phase for nitrogen?

What is the densest phase for nitrogen? a. Solid b. Liquid c. Gas d. supercritical fluid Answer:...

At what temperature and pressure do the three phases coexist in equilibrium?

At what temperature and pressure do the three phases coexist in equilibrium? a. 0.127atm and 63.1K b. 0.127atm and 63.2K c. 1.00atm and 77.4K d....

What is the normal melting point for nitrogen?

What is the normal melting point for nitrogen? a. 63.1K b. 63.2K c. 77.4K d. 126.0K Answer:...

An unknown substance was found to have a melting point of ~300oC and was not soluble water. It is a good conductor in both the melt and solid states. Which of the following substances is the most likely?

An unknown substance was found to have a melting point of ~300oC and was not soluble water. It is a good conductor in both the melt and solid states....

An unknown white solid was found to have a melting point of 150oC. It is soluble in water, but it is a poor conductor in aqueous solution. Which of the following substances is the most likely?

An unknown white solid was found to have a melting point of 150oC. It is soluble in water, but it is a poor conductor in aqueous solution. Which...

Both solid and liquid CCl4 are molecular in nature. Which of the following statements is true?

Both solid and liquid CCl4 are molecular in nature. Which of the following statements is true? a. Liquid CCl4 is much more compressible and more...

When X-rays with ? = 193.7 pm are used, the second-order Bragg reflection from a set of parallel planes in a rubidium crystal occurs at an angle ? = 29.37°. Calculate the distance between the planes in the crystal.

When X-rays with ? = 193.7 pm are used, the second-order Bragg reflection from a set of parallel planes in a rubidium crystal occurs at an angle ? =...

Shown below is the unit cell for sodium chloride. The larger spheres represent the chloride anions. How would you describe the crystal packing structure for the chloride anions?

Shown below is the unit cell for sodium chloride. The larger spheres represent the chloride anions. How would you describe the crystal packing structure...

As iron is heated to 1181K, it adopts one type of cubic cell (A); then, as the temperature rises to 1674K, it changes to another cubic cell (B). The iron is changing from a _ unit cell to a _unit cell.

As iron is heated to 1181K, it adopts one type of cubic cell (A); then, as the temperature rises to 1674K, it changes to another cubic cell (B). The...

The metal niobium crystallizes in a body-centered cubic unit cell. When x-rays with a wavelength of 0.8302Å are used, the second-order (n=2) Bragg reflection from a set of parallel planes in a niobium crystal is observed at an angle of ? = 14.57?. If the distance between these planes corresponds to a unit cell length (d = a), calculate the edge length of the niobium unit cell.

The metal niobium crystallizes in a body-centered cubic unit cell. When x-rays with a wavelength of 0.8302Å are used, the second-order (n=2) Bragg reflection...

A certain compound is formed by directional covalent bonds with a large gap between the filled and empty molecular orbitals. It has a melting point of 1800oC. What is the crystal structure?

A certain compound is formed by directional covalent bonds with a large gap between the filled and empty molecular orbitals. It has a melting point...

You have a white, crystalline solid which melts at 88oC. It does not conduct electricity in the solid phase, and when it dissolves in water it still does not conduct electricity. Which of the following is the most likely formula for this compound?

You have a white, crystalline solid which melts at 88oC. It does not conduct electricity in the solid phase, and when it dissolves in water it still...

You have a white, crystalline solid which has a melting point of 800oC. It does not conduct electricity in the solid phase, but it forms a conducting solution when dissolved in water. Which of the following is the most likely formula for this compound?

You have a white, crystalline solid which has a melting point of 800oC. It does not conduct electricity in the solid phase, but it forms a conducting...

The electron sea model explains ______.

The electron sea model explains ______. a. the chemical reactivity of most metals b. why most metals are solids at room temperature c. the thermal...

Identify the line segment on the above diagram where the enthalpy of fusion is used to calculate energy flow:

Identify the line segment on the above diagram where the enthalpy of fusion is used to calculate energy flow: a. line segment A - B b. line segment...

Identify the line segment on the diagram below where the enthalpy of vaporization is used to calculate energy flow:

Identify the line segment on the diagram below where the enthalpy of vaporization is used to calculate energy flow: a. line segment A - B b. line...

Identify the line segment on the diagram below where the specific heat of the solid is used to calculate energy flow:

Identify the line segment on the diagram below where the specific heat of the solid is used to calculate energy flow: a. line segment A - B b. line...

Calculate the amount of energy required to melt a 48.9g sample of cobalt at its normal melting point. Boiling point = 3097oC ? Hvap = 389 kJ/mol melting point = 1495oC ? Hfus = 15.5 kJ/mol specific heat solid = 0.418 J/goC specific heat liquid = 0.686 J/goC

Calculate the amount of energy required to melt a 48.9g sample of cobalt at its normal melting point.Boiling point = 3097oC ? Hvap = 389 kJ/molmelting...

The vapor pressure of liquid iron is 400mmHg at 2890K. Assuming that its heat of vaporization is 356 kJ/mol, calculate the vapor pressure of liquid iron at a temperature of 3110K.

The vapor pressure of liquid iron is 400mmHg at 2890K. Assuming that its heat of vaporization is 356 kJ/mol, calculate the vapor pressure of liquid...

Choose the statement which best explains why the boiling point of ICl (97 oC) is higher than the boiling point of Br2 (59 oC):

Choose the statement which best explains why the boiling point of ICl (97 oC) is higher than the boiling point of Br2 (59 oC): a. The molecular weight...

Which of the above would you predict to have the highest vapor pressure?

Which of the above would you predict to have the highest vapor pressure? a. N-ethylpropanamide c. ethyl methyl ketone b. diethyl ether d. cyclopentane Answer:...

What is the normal boiling point of methanol?

What is the normal boiling point of methanol? a. 50oC b. 55oC c. 60oC d. 65oC e. 70oC Answer:...

Which of the compounds above has the strongest intermolecular forces?

Which of the compounds above has the strongest intermolecular forces? a. Carbon disulfide, CS2 b. Methanol, CH3OH c. Ethanol, CH3CH2OH d. Heptane,...

At 10.0oC, the vapor pressure of nitric acid is 26.6 mmHg, and at 50.0oC, the vapor pressure is 208 mmHg. Using this information, calculate the heat of vaporization (?Hvap) of nitric acid.

At 10.0oC, the vapor pressure of nitric acid is 26.6 mmHg, and at 50.0oC, the vapor pressure is 208 mmHg. Using this information, calculate the heat...

How much energy is given off when 55.0g of steam at 115.0oC is cooled to water at 75.0oC? (csteam = 2.0 J/goC cwater = 4.18 J/goC cice = 2.03 J/goC) (?Hvap = 40.7 kJ/mol ?Hfus = 6.02 kJ/mol)

How much energy is given off when 55.0g of steam at 115.0oC is cooled to water at 75.0oC?(csteam = 2.0 J/goC cwater = 4.18 J/goC cice = 2.03 J/goC)(?Hvap...

Which of the following compounds has a boiling point closest to that of argon?

Which of the following compounds has a boiling point closest to that of argon? a. F2 b. Cl2 c. HCl d. NaF e. HF Answer:...

Which of the following compounds would have the highest boiling point?

Which of the following compounds would have the highest boiling point? a. KCl b. CH3OCH3 c. CH3CH2CH3 d. CH3CH2NH2 e. C12H22O11 Answer:...

What is the strongest type of interparticle force present in the solid H2S?

What is the strongest type of interparticle force present in the solid H2S? a. Ion-ion b. Hydrogen-bonding c. Dipole-dipole d. Dispersion Answer:...

What is the simplest formula of the compound represented by the unit cell provided below?

What is the simplest formula of the compound represented by the unit cell provided below? a. AB2 b. AB3 c. AB d. A2B4 e. A2B6 Answer:...

The metal potassium crystallizes in a body-centered cubic lattice. If the radius of potassium is 227 pm, what is the unit cell edge length?

The metal potassium crystallizes in a body-centered cubic lattice. If the radius of potassium is 227 pm, what is the unit cell edge length? a. 524...

Strontium crystallizes in a face-centered cubic lattice. The density of the element is 2.63 g/cm3. What is the volume of a single unit cell?

Strontium crystallizes in a face-centered cubic lattice. The density of the element is 2.63 g/cm3. What is the volume of a single unit cell? a.2.21...

The metal lead crystallizes in a face-centered cubic lattice with an edge length of 495.1 pm. What is the density of lead?

The metal lead crystallizes in a face-centered cubic lattice with an edge length of 495.1 pm. What is the density of lead? a. 0.709 g/cm3 b. 2.84...

The space-filling representation provided below is an example of a _ unit cell, which contains _ atom(s).

The space-filling representation provided below is an example of a _____ unit cell, which contains _____ atom(s). a. simple cubic, 1 atom b. body...

Which of the following statements concerning the accompanying phase diagram is false?

Which of the following statements concerning the accompanying phase diagram is false? a. The solid is less dense than the liquid. b. Point C is the...

How much heat is released at constant pressure if a 18.0-L tank containing 42.0 atm of hydrogen sulfide gas condenses at its boiling point of -60.0oC? The enthalpy of vaporization of hydrogen sulfide is 18.7 kJ/mol at -60.0oC. (R = 0.0821 L • atm/(K • mol))

How much heat is released at constant pressure if a 18.0-L tank containing 42.0 atm of hydrogen sulfide gas condenses at its boiling point of -60.0oC?...

Which of the following involves a change in temperature during the phase transition?

Which of the following involves a change in temperature during the phase transition? a. deposition of carbon dioxide b. fusion of ethanol c. condensation...

Elements that have their highest energy electrons in a filled band of molecular orbitals that is separated from the lowest empty band by an energy difference much too large for electrons to jump between bands are called ____.

Elements that have their highest energy electrons in a filled band of molecular orbitals that is separated from the lowest empty band by an energy difference...

The electrical conductivity of a metal with increasing temperature and that of a semiconductor with increasing temperature.

The electrical conductivity of a metal ____ with increasing temperature and that of a semiconductor ____ with increasing temperature. a. increases;...

Which one of the following elements is considered an insulator?

Which one of the following elements is considered an insulator? a. Fe b. Ga c. N d. Ge e. Si Answer:...

Which one of the following elements is considered a semiconductor?

Which one of the following elements is considered a semiconductor? a. Li b. Fe c. Cl d. Ni e. Si Answer:...

The conduction band of magnesium is thought to result from the combination of molecular orbitals resulting from overlap of ____ atomic orbitals.

The conduction band of magnesium is thought to result from the combination of molecular orbitals resulting from overlap of ____ atomic orbitals. a....

In the metallic bonding of Na, the conduction band consists of molecular orbitals and the empty band consists of molecular orbitals.

In the metallic bonding of Na, the conduction band consists of ____ molecular orbitals and the empty band consists of ____ molecular orbitals. a....

Consider the metallic bonding in lithium. The interaction of all the 2s orbitals of one mole of lithium atoms produces a band consisting of ____ mole(s) of molecular orbitals (s2s and s*2s).

Consider the metallic bonding in lithium. The interaction of all the 2s orbitals of one mole of lithium atoms produces a band consisting of ____ mole(s)...

An unknown metal crystallized in the hexagonal closest-packed structure and has a density of 12.2 g/cm3. Its atomic radius is 1.34Å. There are 4 atoms per unit cell. What is the metal?

An unknown metal crystallized in the hexagonal closest-packed structure and has a density of 12.2 g/cm3. Its atomic radius is 1.34Å. There are 4 atoms...

In ideal close-packed structures of metallic solids, how many nearest neighbors does a metal ion have?

In ideal close-packed structures of metallic solids, how many nearest neighbors does a metal ion have? a. 4 b. 3 c. 6 d. 8 e. 12 Answer:...

The density of palladium is 12.0 g/cm3. The unit cell of Pd is a face-centered cube. Calculate the atomic radius of Pd.

The density of palladium is 12.0 g/cm3. The unit cell of Pd is a face-centered cube. Calculate the atomic radius of Pd. a. 1.26Å b. 1.37Å c. 1.44Å d....

Metallic calcium crystallized in a face-centered cubic lattice, and the atomic radius of calcium is 1.97Å. Calculate the density of calcium.

Metallic calcium crystallized in a face-centered cubic lattice, and the atomic radius of calcium is 1.97Å. Calculate the density of calcium. a. 1.28...

Metallic calcium crystallized in a face-centered cubic lattice and the atomic radius of calcium is 1.97Å. Calculate the edge length, a, of a unit cell of calcium.

Metallic calcium crystallized in a face-centered cubic lattice and the atomic radius of calcium is 1.97Å. Calculate the edge length, a, of a unit cell...

What is the coordination number for each sphere (metal ion) in a body-centered cubic structure?

What is the coordination number for each sphere (metal ion) in a body-centered cubic structure? a. 4 b. 3 c. 6 d. 8 e. 12 Answer:...

For crystal structures that contain only one kind of atom, the nearest neighbors of each atom can be visualized as lying along a line of the unit cell. For a body-centered cubic structure what is the orientation of that line with respect to the unit cell and how many atomic radii does it contain?

For crystal structures that contain only one kind of atom, the nearest neighbors of each atom can be visualized as lying along a line of the unit cell....

For crystal structures that contain only one kind of atom, the nearest neighbors of each atom can be visualized as lying along a line of the unit cell. For a simple cubic structure what is the orientation of that line with respect to the unit cell and how many atomic radii does it contain?

For crystal structures that contain only one kind of atom, the nearest neighbors of each atom can be visualized as lying along a line of the unit cell....

Which of the following solids could be described in this way: high melting point, hard solid, poor electrical conductor, non-electrolytic solution.

Which of the following solids could be described in this way: high melting point, hard solid, poor electrical conductor, non-electrolytic solution. a....

Arrange the following in order of increasing melting points. KCl, He, H2O, HF

Arrange the following in order of increasing melting points.KCl, He, H2O, HF a. He < H2O < HF < KCl b. H2O < HF < He < KCl c. KCl...

Arrange the following in order of increasing melting points. KCl, He, H2O, HF

Arrange the following in order of increasing melting points.KCl, He, H2O, HF a. He < H2O < HF < KCl b. H2O < HF < He < KCl c. KCl...

Arrange the following in order of increasing melting points. CsCl, BaCl2, diamond (C), H2, HF

Arrange the following in order of increasing melting points.CsCl, BaCl2, diamond (C), H2, HF a. H2 < HF < BaCl2 < CsCl < diamond b. HF...

Arrange the following ionic compounds in order of increasing melting points. NaF, MgF2, AlF3, NaBr, NaI

Arrange the following ionic compounds in order of increasing melting points.NaF, MgF2, AlF3, NaBr, NaI a. NaF < NaBr < NaI < MgF2 < AlF3 b....

Which of the following solid compounds has the highest melting point?

Which of the following solid compounds has the highest melting point? a. Al2O3 b. MgF2 c. NaF d. CaF2 e. AlF3 Answer:...

Which of the following compounds would be expected to have the highest melting point?

Which of the following compounds would be expected to have the highest melting point? a. BaF2 b. BaCl2 c. BaBr2 d. BaI2 e. NaF Answer:...

Which one of the following melts at the lowest temperature at a given pressure?

Which one of the following melts at the lowest temperature at a given pressure? a. CH4 b. SiH4 c. NH3 d. SOCl2 e. H2O Answer:...

Substances have properties that are related to their structures. Which of the following statements regarding properties of solids is not expected to be correct?

Substances have properties that are related to their structures. Which of the following statements regarding properties of solids is not expected to...

Substances have properties that are related to their structures. Which of the following statements regarding properties of solids is not expected to be correct?

Substances have properties that are related to their structures. Which of the following statements regarding properties of solids is not expected to...

Which one of the following pairs is incorrectly matched? Substance / Classification

Which one of the following pairs is incorrectly matched?Substance / Classification a. sand / covalent solid b. diamond / molecular solid c. Fe /...

Which one of the following pairs is incorrectly matched? Substance / Classification

Which one of the following pairs is incorrectly matched?Substance / Classification a. H2O / molecular solid b. paraffin / molecular solid c. KF /...

Which one of the following substances is incorrectly matched with the kind of solid it forms? Substance / Kind of Solid

Which one of the following substances is incorrectly matched with the kind of solid it forms?Substance / Kind of Solid a. sulfur dioxide / molecular b....

Which of the following in the solid state would be an example of a molecular crystal?

Which of the following in the solid state would be an example of a molecular crystal? a. carbon dioxide b. graphite c. cesium fluoride d. iron e....

Which of the following, in the solid state, would be an example of a molecular crystal?

Which of the following, in the solid state, would be an example of a molecular crystal? a. diamond b. copper c. phosphorus trichloride d. magnesium...

Which one of the following crystallizes in a metallic lattice?

Which one of the following crystallizes in a metallic lattice? a. C10H8 b. graphite c. In d. As e. KMnO4 Answer:...

Which one of the following is a molecular solid?

Which one of the following is a molecular solid? a. NH4Cl b. K c. SiC d. C6H6 e. KC2H3O2 Answer:...

Which one of the following is classified as a covalent solid?

Which one of the following is classified as a covalent solid? a. K2SO4 b. Cu c. Co d. C e. CH4 Answer:...

Which type of solid is expected for Ga?

Which type of solid is expected for Ga? a. covalent b. ionic c. metallic d. molecular e. intensive Answer:...

Which type of solid is expected for SO2?

Which type of solid is expected for SO2? a. covalent b. ionic c. metallic d. molecular e. hypersaturated Answer:...

Which one of the following is a metallic solid?

Which one of the following is a metallic solid? a. graphite b. sulfur c. sodium d. silicon e. neon Answer:...

Which one of the following is an ionic solid?

Which one of the following is an ionic solid? a. graphite b. nickel c. ammonium chloride d. silicon carbide, SiC e. sucrose, C12H22O11 Answer:...

Which one of the following is a covalent solid?

Which one of the following is a covalent solid? a. sulfur trioxide b. nickel c. ammonium chloride d. silicon carbide, SiC e. sucrose, C12H22O11 Answer:...

Which one of the following is not a general property of ionic solids?

Which one of the following is not a general property of ionic solids? a. hard and brittle b. good electrical conductors in the solid state c. relatively...

Which one of the following statements is not applicable to molecular solids?

Which one of the following statements is not applicable to molecular solids? a. The units that occupy the lattice points are molecules. b. The binding...

Which one of the following statements is not applicable to metallic solids?

Which one of the following statements is not applicable to metallic solids? a. The units that occupy the lattice points are positive ions. b. The...

Which one of the following statements is not applicable to covalent solids?

Which one of the following statements is not applicable to covalent solids? a. The units that occupy the lattice points are atoms. b. The binding...

A single substance that can crystallize in more than one arrangement is said to be ____.

A single substance that can crystallize in more than one arrangement is said to be ____. a. isomorphous b. amorphous c. primitive d. triclinic e....

In a cubic lattice, an atom on the edge of a unit cell is shared equally by how many unit cells?

In a cubic lattice, an atom on the edge of a unit cell is shared equally by how many unit cells? a. one b. two c. eight d. four e. twelve Answer:...

In a face-centered cubic lattice, an atom laying in a face of a unit cell is shared equally by how many unit cells?

In a face-centered cubic lattice, an atom laying in a face of a unit cell is shared equally by how many unit cells? a. one b. two c. eight d. four e....

In any cubic lattice, an atom at the corner of a unit cell is shared equally by how many unit cells?

In any cubic lattice, an atom at the corner of a unit cell is shared equally by how many unit cells? a. one b. two c. eight d. four e. sixteen Answer:...

In a face-centered cubic lattice, how many atoms are contained in a unit cell?

In a face-centered cubic lattice, how many atoms are contained in a unit cell? a. one b. two c. four d. five e. six Answer:...

In a body-centered cubic lattice, how many atoms are contained in a unit cell?

In a body-centered cubic lattice, how many atoms are contained in a unit cell? a. one b. two c. three d. four e. five Answer:...

Which of the following is an amorphous solid?

Which of the following is an amorphous solid? a. graphite b. sodium chloride c. glass d. quartz e. diamond Answer:...

Amorphous solids are characterized by all the following statements except:

Amorphous solids are characterized by all the following statements except: a. Amorphous solids have no well-defined, ordered structure. b. The intermolecular...

Some solids can be converted directly to the vapor phase by heating. The process is called ____.

Some solids can be converted directly to the vapor phase by heating. The process is called ____. a. fusion b. sublimation c. vaporization d. condensation e....

How much heat would be required to convert 234.3 g of solid benzene, C6H6(s), at 5.5°C into benzene vapor, C6H6(g), at 100.0°C? mp of C6H6(s) = 5.5°C bp of C6H6 = 80.1°C molar heat of fusion at 5.5°C = 9.92 kJ/mol molar heat of vaporization at 80.1°C = 30.8 kJ/mol molar heat capacity of C6H6 = 136 J/mol•°C molar heat capacity of C6H6(g) = 81.6 J/mol•°C

How much heat would be required to convert 234.3 g of solid benzene, C6H6(s), at 5.5°C into benzene vapor, C6H6(g), at 100.0°C?mp of C6H6(s) = 5.5°Cbp...

What will be the final temperature of the liquid water resulting from the mixing of 10.0 grams of steam at 130.°C with 40.0 g of ice at -10.0°C? (Sp. heat of H2O(s) = 2.09 J/g•°C, Sp. heat of H2O = 4.18 J/g•°C, Sp. heat of H2O(g) = 2.03 J/g•°C; heat of fusion of H2O(s) = 333 J/g, heat of vap. of H2O = 2260 J/g)

What will be the final temperature of the liquid water resulting from the mixing of 10.0 grams of steam at 130.°C with 40.0 g of ice at -10.0°C? (Sp....

A chemical reaction releases 58,500 J of heat into 150 g of water. Assuming no heat is lost to the surroundings, what is the temperature increase of the water? (Sp. heat of H2O = 4.18 J/g•°C)

A chemical reaction releases 58,500 J of heat into 150 g of water. Assuming no heat is lost to the surroundings, what is the temperature increase of...

If 10.0 g of ice at -10.0°C is placed in 200. g of water at 80.0°C in an insulated container, what will be the temperature of the system when equilibrium is established? (Sp. heat of H2O(s) = 2.09 J/g•°C, Sp. heat of H2O = 4.18 J/g•°C, heat of fus. of H2O(s) = 333 J/g)

If 10.0 g of ice at -10.0°C is placed in 200. g of water at 80.0°C in an insulated container, what will be the temperature of the system when equilibrium...

Calculate the amount of heat required to convert 10.0 grams of ice at -20.°C to steam at 120.°C. (Sp. heat of H2O(s) = 2.09 J/g•°C, Sp. heat of H2O = 4.18 J/g•°C, Sp heat of H2O(g) = 2.03 J/g•°C; heat of fus. of H2O(s) = 333 J/g, heat of vap. of H2O = 2260 J/g)

Calculate the amount of heat required to convert 10.0 grams of ice at -20.°C to steam at 120.°C. (Sp. heat of H2O(s) = 2.09 J/g•°C, Sp. heat of H2O...

What is the specific heat of a metal if a ten gram sample at 40.2°C is dropped into 100 grams of water at 25.4°C and the temperature rises to 28.6°C? (Sp. heat of H2O = 4.18 J/g•°C)

What is the specific heat of a metal if a ten gram sample at 40.2°C is dropped into 100 grams of water at 25.4°C and the temperature rises to 28.6°C?...

What would be the final temperature of the system if 30.0 g of lead at 150.°C is dropped into 10.0 g of water at 10.0°C in an insulated container? (Sp. heat of H2O = 4.18 J/g•°C, Sp. heat of Pb(s) = 0.128 J/g•°C)

What would be the final temperature of the system if 30.0 g of lead at 150.°C is dropped into 10.0 g of water at 10.0°C in an insulated container? (Sp....

Which of the following does not affect the amount of heat transferred in solids?

Which of the following does not affect the amount of heat transferred in solids? a. The value of specific heat. b. The amount of mass. c. The nature...

The amount of energy associated with holding the individual particles (atoms, ions, or molecules) together in a crystal lattice is most directly related to ____.

The amount of energy associated with holding the individual particles (atoms, ions, or molecules) together in a crystal lattice is most directly related...

Changes in pressure have effects on melting point; changes in pressure have effects on boiling points.

Changes in pressure have ____ effects on melting point; changes in pressure have ____ effects on boiling points. a. small; small b. small; large c....

The melting point of a solid is the same as the ____ of its liquid.

The melting point of a solid is the same as the ____ of its liquid. a. boiling point b. freezing point c. sublimation point d. triple point e. critical...

Which response has the following substances arranged in order of increasing boiling point? Ar, NaClO3, H2O, H2Se

Which response has the following substances arranged in order of increasing boiling point?Ar, NaClO3, H2O, H2Se a. NaClO3 < H2O < H2Se <...

The Hvap is related to the strength of intermolecular forces. Which of the following has the lowest ?Hvap?

The Hvap is related to the strength of intermolecular forces. Which of the following has the lowest ?Hvap? a. C3H8 b. C6H12 c. C3H7OH d. C3H7NH2 e....

Which substance would be expected to have the highest heat of vaporization?

Which substance would be expected to have the highest heat of vaporization? a. Cl2 b. CCl4 c. C2Cl4 d. CH3OCH3 e. CH2OHCH2OH Answer:...

Using the Clausius-Clapeyron equation determine the vapor pressure of water at 50.0°C. The molar heat of vaporization of water is 40.7 kJ/mol.

Using the Clausius-Clapeyron equation determine the vapor pressure of water at 50.0°C. The molar heat of vaporization of water is 40.7 kJ/mol. a....

If 10.0 g of steam at 110.0°C is pumped into an insulated vessel containing 100. g of water at 20.0°C, what will be the equilibrium temperature of the mixture? (Sp. heat of H2O = 4.18 J/g•°C, Sp. heat of H2O(g) = 2.03 J/g•°C, heat of vap. of H2O = 2.260 kJ/g)

If 10.0 g of steam at 110.0°C is pumped into an insulated vessel containing 100. g of water at 20.0°C, what will be the equilibrium temperature of the...

If 100. grams of liquid water at 100.°C and 200. grams of water at 20.0°C are mixed in an insulated container, what will the final temperature of the mixture be? (Sp. heat of H2O = 4.18 J/g•°C)

If 100. grams of liquid water at 100.°C and 200. grams of water at 20.0°C are mixed in an insulated container, what will the final temperature of the...

How much heat is released when 40.0 g of steam at 250.0°C cools and condenses to water at 30.0°C? (Sp. heat of H2O = 4.18 J/g•°C, Sp. heat of H2O(g) = 2.03 J/g•°C, heat of vap. of H2O = 2.260 kJ/g)

How much heat is released when 40.0 g of steam at 250.0°C cools and condenses to water at 30.0°C? (Sp. heat of H2O = 4.18 J/g•°C, Sp. heat of H2O(g)...

Calculate the amount of heat (in joules) required to convert 92.5 g of water at 25.0°C to steam at 108.0°C. (Sp. heat of H2O = 4.18 J/g•°C, Sp. heat of H2O(g) = 2.03 J/g•°C, heat of vap. of H2O = 2.260 kJ/g)

Calculate the amount of heat (in joules) required to convert 92.5 g of water at 25.0°C to steam at 108.0°C. (Sp. heat of H2O = 4.18 J/g•°C, Sp. heat...

How much heat is absorbed if 45 grams of sweat is evaporated from someone's skin? ?Hvap for water at body temperature is 2.41 kJ/g.

How much heat is absorbed if 45 grams of sweat is evaporated from someone's skin? ?Hvap for water at body temperature is 2.41 kJ/g. a. 43,400 J b....

How much heat is released when 165 g of liquid benzene, C6H6 , cools from 78.0°C to 12.0°C? (Sp. heat of C6H6 = 1.74 J/g•°C)

How much heat is released when 165 g of liquid benzene, C6H6 , cools from 78.0°C to 12.0°C? (Sp. heat of C6H6 = 1.74 J/g•°C) a. 4.35 J b. 6.26 kJ c....

Calculate the amount of heat required to raise the temperature of 165 g of water from 12.0°C to 88.0°C. (Sp. heat of H2O = 4.18 J/g•°C)

Calculate the amount of heat required to raise the temperature of 165 g of water from 12.0°C to 88.0°C. (Sp. heat of H2O = 4.18 J/g•°C) a. 52.4 kJ b....

On a relative basis, the weaker the intermolecular forces in a substance are,

On a relative basis, the weaker the intermolecular forces in a substance are, a. the larger is its heat of vaporization. b. the more it deviates...

Which one of the following would have the highest molar heat of vaporization?

Which one of the following would have the highest molar heat of vaporization? a. CH3NH2 b. CH4 c. C2H6 d. SiH4 e. H2S Answer:...

Which property is not affected by strength of intermolecular forces?

Which property is not affected by strength of intermolecular forces? a. viscosity b. boiling point c. density d. vapor pressure e. molar heat of...

Which one of the following boils at the lowest temperature?

Which one of the following boils at the lowest temperature? a. H2O b. H2S c. H2Se d. H2Te e. H2Po Answer: B a. KNO3 b. XeF4 c. Kr d. NH3 e....

Which of the following boils at the highest temperature?

Which of the following boils at the highest temperature? a. C2H6 b. C3H8 c. C4H10 d. C5H12 e. C6H14 Answer:...

Which technique listed below separates a mixture of liquids on the basis of their boiling points?

Which technique listed below separates a mixture of liquids on the basis of their boiling points? a. distillation b. extraction c. filtration d....

Which one of the following statements does not describe the general properties of liquids accurately?

Which one of the following statements does not describe the general properties of liquids accurately? a. In the liquid state the close spacing of...

Volatile liquids are described by all of the following except:

Volatile liquids are described by all of the following except: a. Volatile liquids are easily vaporized. b. Volatile liquids have relatively high...

As we increase the temperature of a liquid, its properties change. Which of the following would not be an expected change in the properties of a typical liquid as we increase its temperature?

As we increase the temperature of a liquid, its properties change. Which of the following would not be an expected change in the properties of a typical...

All of the following are gases at room temperature and atmospheric pressure. Which one will liquefy most easily when pressurized at a certain temperature?

All of the following are gases at room temperature and atmospheric pressure. Which one will liquefy most easily when pressurized at a certain temperature? a....

Which liquid would evaporate most quickly at room temperature?

Which liquid would evaporate most quickly at room temperature? a. H2O, 18 g/mol b. Gasoline, C8H18, 114 g/mol c. Vegetable oil, 895 g/mol d. Mineral...

Car wax works to repel water because ____.

Car wax works to repel water because ____. a. wax exerts a very low adhesive force for water. b. the cohesive forces in water are very low. c. of...

Capillary action is ____

Capillary action is ____ a. resistance to flow. b. the rate of collisions for gas molecules. c. the energy required to overcome the attractive forces...

Which of these liquids would have the highest surface tension at 25°C?

Which of these liquids would have the highest surface tension at 25°C? a. Br2 b. H2O c. CCl4 d. C5H12 e. CH3OCH3 Answer:...

The most stable situation for liquid surface molecules is one in which the surface area is minimal. For a given volume, what shape has the least possible surface area?

The most stable situation for liquid surface molecules is one in which the surface area is minimal. For a given volume, what shape has the least possible...

Which of the following does not correctly describe viscosity?

Which of the following does not correctly describe viscosity? a. Viscosity is the resistance to flow of a liquid. b. Viscosity can be measured with...

The term used to describe resistance to flow of a liquid is ____.

The term used to describe resistance to flow of a liquid is ____. a. surface tension b. capillary action c. viscosity d. vapor pressure e. vaporization Answer:...

Which liquid would have the highest viscosity at room temperature?

Which liquid would have the highest viscosity at room temperature? a. C8H17NH2 b. C7H14 c. C9H18 d. C5H12 e. CH3NH2 Answer:...

Which response includes all of the following compounds that exhibit hydrogen bonding and no other compounds? CH4, AsH3, CH3NH2, H2Te, HF

Which response includes all of the following compounds that exhibit hydrogen bonding and no other compounds?CH4, AsH3, CH3NH2, H2Te, HF a. AsH3,...

Which response correctly identifies all the interactions that might affect the properties of BF3?

Which response correctly identifies all the interactions that might affect the properties of BF3? a. dispersion force, ion-ion interaction b. hydrogen...

Dispersion forces are the only significant factor affecting boiling point for all the following compounds except?

Dispersion forces are the only significant factor affecting boiling point for all the following compounds except? a. Ar b. H2SO4 c. CF4 d. Br2 e....

Which response correctly identifies all the interactions that might affect the properties of BrI?

Which response correctly identifies all the interactions that might affect the properties of BrI? a. dispersion force, ion-ion interaction b. hydrogen...

Which of the following substances will have the strongest intermolecular forces?

Which of the following substances will have the strongest intermolecular forces? a. H2S b. NO c. CH3NH2 d. HCl e. Rn Answer:...

For which of the following would hydrogen bonding not be an important factor in determining physical properties in the liquid state?

For which of the following would hydrogen bonding not be an important factor in determining physical properties in the liquid state? a. HBr b. H2O c....

For which of the following would dispersion forces be the most important factor in determining physical properties in the liquid state?

For which of the following would dispersion forces be the most important factor in determining physical properties in the liquid state? a. H2O b....

For which of the following would permanent dipole-dipole interactions play an important role in determining physical properties in the liquid state?

For which of the following would permanent dipole-dipole interactions play an important role in determining physical properties in the liquid state? a....

The boiling points of the halogens increase in the order F2 < Cl2 < Br2 < I2 due to the resulting increasing ____ interactions.

The boiling points of the halogens increase in the order F2 < Cl2 < Br2 < I2 due to the resulting increasing ____ interactions. a. ion-dipole b....

Which of the following interactions are the strongest?

Which of the following interactions are the strongest? a. hydrogen bonding force b. ion-ion interactions c. permanent dipole force d. dispersion force e....

Which one of the following statements does not describe the general properties of solids accurately?

Which one of the following statements does not describe the general properties of solids accurately? a. Solids have characteristic volumes that do...

Identify which property liquids do not have in common with solids.

Identify which property liquids do not have in common with solids. a. rigid shape b. volumes do not change significantly with pressure c. hydrogen...

Which one of the following statements does NOT describe the general properties of liquids accurately?

Which one of the following statements does NOT describe the general properties of liquids accurately? a. Liquids have characteristic volumes that...

Which of the following is a binary molecular compound?

Which of the following is a binary molecular compound? a. BeHCO3 b. PCl5 c. AgI d. MgS Answer:...

Molecular compounds are usually ____.

Molecular compounds are usually ____. a. composed of two or more transition elements b. composed of positive and negative ions c. composed of two...

What type of compound is CuSO?

What type of compound is CuSO? a. monotomic ionic b. polyatomic covalent c. polyatomic ionic d. binary molecular Answer:...

Which of the following compounds contains the Mn ion?

Which of the following compounds contains the Mn ion? a. MnS b. MnBr 2 c. Mn2 O3 d. MnO Answer:...

An -ate or -ite at the end of a compound name usually indicates that the compound contains ____.

An -ate or -ite at the end of a compound name usually indicates that the compound contains ____. a. fewer electrons than protons b. neutral molecules c....

When Group 2A elements form ions, they ____.

When Group 2A elements form ions, they ____. a. lose two protons b. gain two protons c. lose two electrons d. gain two electrons Answer:...

What type of ions have names ending in -ide?

What type of ions have names ending in -ide? a. only cations b. only anions c. only metal ions d. only gaseous ions Answer:...

A molecule with a single covalent bond is ____.

A molecule with a single covalent bond is ____. a. CO 2 b. Cl 2 c. CO d. N 2 Answer:...

Which of the following elements can form diatomic molecules held together by triple covalent bonds?

Which of the following elements can form diatomic molecules held together by triple covalent bonds? a. carbon b. oxygen c. fluorine d. nitrogen Answer:...

Why do atoms share electrons in covalent bonds?

Why do atoms share electrons in covalent bonds? a. to become ions and attract each other b. to attain a noble-gas electron configuration c. to become...

Which of these elements does not exist as a diatomic molecule?

Which of these elements does not exist as a diatomic molecule? a. Ne b. F c. H d. I Answer:...

What characteristic of metals makes them good electrical conductors?

What characteristic of metals makes them good electrical conductors? a. They have mobile valence electrons. b. They have mobile protons. c. They...

What is the basis of a metallic bond?

What is the basis of a metallic bond? a. the attraction of metal ions to mobile electrons b. the attraction between neutral metal atoms c. the neutralization...

Which of the following particles are free to drift in metals?

Which of the following particles are free to drift in metals? a. protons b. electrons c. neutrons d. cations Answer:...

Under what conditions can potassium bromide conduct electricity?

Under what conditions can potassium bromide conduct electricity? a. only when melted b. only when dissolved c. only when it is in crystal form d....

Ionic compounds are normally in which physical state at room temperature?

Ionic compounds are normally in which physical state at room temperature? a. solid b. liquid c. gas d. plasma Answer:...

Which of the following pairs of elements is most likely to form an ionic compound?

Which of the following pairs of elements is most likely to form an ionic compound? a. magnesium and fluorine b. nitrogen and sulfur c. oxygen and...

What is the net charge of the ionic compound calcium fluoride?

What is the net charge of the ionic compound calcium fluoride? a. 2- b. 1- c. 0 d. 1 Answer:...

Which of the following occurs in an ionic bond?

Which of the following occurs in an ionic bond? a. Oppositely charged ions attract. b. Two atoms share two electrons. c. Two atoms share more than...

What is the formula of the ion formed when phosphorus achieves a noble-gas electron configuration?

What is the formula of the ion formed when phosphorus achieves a noble-gas electron configuration? a. P 3+ b. P 2+ c. P 2- d. P 3- Answer:...

The octet rule states that, in chemical compounds, atoms tend to have ____.

The octet rule states that, in chemical compounds, atoms tend to have ____. a. the electron configuration of a noble gas b. more protons than electrons c....

How does calcium obey the octet rule when reacting to form compounds?

How does calcium obey the octet rule when reacting to form compounds? a. It gains electrons. b. It gives up electrons. c. It does not change its...

Fluorine belongs to group 7A. How many covalent bonds are formed between two fluorine atoms?

Fluorine belongs to group 7A. How many covalent bonds are formed between two fluorine atoms? a. 1 b. 2 c. 3 d. 4 Answer:...

Which is the correct name for the acid compound HNO2?

Which is the correct name for the acid compound HNO2? a. H3P b. HPO3 c. H3PO4 d. H3PO3 Answer:...

Which is the correct name for the acid compound HClO3?

Which is the correct name for the acid compound HClO3? a. hydrogen chlorate acid b. chloric acid c. hydrogen chloride trioxide acid d. hydrochloric...

Which is the formula for the comound sulfur hexachloride?

Which is the formula for the comound sulfur hexachloride? a. S6Cl b. SCl6 c. SCl5 d. S2Cl3 Answer:...

Which is the correct formula for the compound dinitrogen monoxide?

Which is the correct formula for the compound dinitrogen monoxide? a. NO2 b. (NO)2 c. N2O1 d. N2O Answer:...

Which is the correct name for the compound N2O4?

Which is the correct name for the compound N2O4? a. tetranitrogen dioxide b. dinitrogen tetroxide c. dinitrogen quadoxide d. nitrogen oxide Answer:...

Which is the correct name for the compound PCl5?

Which is the correct name for the compound PCl5? a. monophosphorus tetrachloride b. phosphorus chloride c. phophorus pentachloride d. pentaphophorus...

Which is the correct name for the compound N2O3?

Which is the correct name for the compound N2O3? a. dinitro trioxide b. nitrogen (II) oxide (III) c. trinitrogen dioxide d. dinitrogen trioxide Answer:...

Covalent compound display which of these properties?

Covalent compound display which of these properties? a. they are hard brittle soilds b. they have high melting and boiling points c. they display...

How many single covalent bonds can carbon form?

How many single covalent bonds can carbon form? a. 1 b. 2 c. 3 d. 4 Answer:...

A formula unit of calcium bromide has two bromide ions corresponding to each calcium ion in the compound. What is the formula of calcium bromide?

A formula unit of calcium bromide has two bromide ions corresponding to each calcium ion in the compound. What is the formula of calcium bromide? a....

What is the formula of the compound when sodium and chloride react?

What is the formula of the compound when sodium and chloride react? a. Na2Cl b. NaCl2 c. NaCl d. Na2Cl2 Answer:...

Which is the correct name for the compound NH4SO4?

Which is the correct name for the compound NH4SO4? a. nitrogen hydrogen sulfate b. nitrogen hydrosulfate c. ammonium (II) sulfate d. ammonium sulfate Answer:...

Which is the correct name for the compound CoCO3?

Which is the correct name for the compound CoCO3? a. carbon oxygen carbonate b. cobolt (II) carbonate c. cobolt carbonate d. cobolt carbonoxide Answer:...

Which is the correct name for the Na3P?

Which is the correct name for the Na3P? a. sodium phosphide b. sodium phosphite c. sodium phodphate d. sodium (III) phophide Answer:...

Which is the correct name for the compound CaClO2?

Which is the correct name for the compound CaClO2? a. calcium chloride b. calcium chloroxide c. calcium chlorite d. calcium chlorate Answer:...

Which is the correct name for the compoud FeS?

Which is the correct name for the compoud FeS? a. Iron sulfide b. Iron (I) sulfide c. Iron (II) Sulfide d. Iron (II) Sulfide (II) Answer:...

Which is the correct formula for the compound chromium (II) nitrate?

Which is the correct formula for the compound chromium (II) nitrate? a. (Cr)2NO3 b. Cr2NO3 c. CrNO2 d. Cr(NO3)2 Answer:...

Which is the correct formula for the compound magnesium (III) fluoride?

Which is the correct formula for the compound magnesium (III) fluoride? a. MnF b. Mn3F c. MnF3 d. Mn3F3 Answer:...

What is the correct formula for the compound between magnesium and phosphate ion?

What is the correct formula for the compound between magnesium and phosphate ion? a. MgPO4 b. Mg3PO2 c. Mg3(PO4)2 d. MgP2O8 Answer:...

Which is the correct formula for the compound formed between beryllium and nitrogen?

Which is the correct formula for the compound formed between beryllium and nitrogen? a. BeN b. Be3N c. Be3N2 d. Be2N3 Answer:...

Which is a physical property of ionic compounds in their soild state?

Which is a physical property of ionic compounds in their soild state? a. good conductor of electricity b. weak attractive forces between ions c....

Group 13 elements tend to acquire which charge when they form ions?

Group 13 elements tend to acquire which charge when they form ions? a. +3 b. -5 c. +5 d. -3 Answer:...

Which is the charge that results when oxygen becomes an ion?

Which is the charge that results when oxygen becomes an ion? a. +2 b. -3 c. +3 d. -2 Answer:...

Which is described as the force holding two atoms together?

Which is described as the force holding two atoms together? a. cation b. chemical bond c. formula unit d. lattice Answer:...

Based on the table shown elements from columns a and c will combine in which ratio?

Based on the table shown elements from columns a and c will combine in which ratio? a. 1 A: 3 C b. 1 A: 1 C c. 3 A: 1 C d. these elements will not...

Which ion is this atom most likely to form( 11 electrons)

Which ion is this atom most likely to form( 11 electrons) a. Na + b. Na - c. Ne - d. Mg + Answer:...

Which of these elements has 3 valence electrons?

Which of these elements has 3 valence electrons? a. boron b. rubidium c. vanadium d. arsenic Answer:...

Which element has the configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d4?

Which element has the configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d4? a. titanium b. chromium c. sulfer d. selenium Answer:...

Which is the correct number of valence electrons in the element Antimony?

Which is the correct number of valence electrons in the element Antimony? a. 5 b. 6 c. 2 d. 4 Answer:...

Which is the correct number of valence electrons in the element zinc?

Which is the correct number of valence electrons in the element zinc? a. 30 b. 65.38 c. 2 d. 4 Answer:...

An industrially important element contains 26 electrons and rusts in the presence of air and moisture. Identify the element.

An industrially important element contains 26 electrons and rusts in the presence of air and moisture. Identify the element. a. aluminum b....

How many electrons are in an neutral atom of Uranium?

How many electrons are in an neutral atom of Uranium? a. 2 b. 92 c. 6 d. 146 Answer:...

How many neutrons are in an atom of cobolt?

How many neutrons are in an atom of cobolt? a. 17 b. 16 c. 33 d. 32 Answer:...

Which property describes how much energy must be added to an atom to remove an outermost electron?

Which property describes how much energy must be added to an atom to remove an outermost electron? a. atomic radiud b. ionic radius c. electronegativity d....

Identify the period and group numbers of the element with the electrons configuration. [Ne] 3s2 3p4

Identify the period and group numbers of the element with the electrons configuration. [Ne] 3s2 3p4 a. period 2, group 4 b. period 3, group 4 c....

In which pair is the one on the left larger than the one on the right?

In which pair is the one on the left larger than the one on the right? a. Na, Rb b. S, Mg c. Br, Br- d. K, K+ Answer:...

According to ___ periodic table, the physical and chemical properties of elements are periodic functions of their atomic weights?

According to ___ periodic table, the physical and chemical properties of elements are periodic functions of their atomic weights? a. Dmitri Mendeleev b....

Which is the most important characteristic in determining an element's chemical properties?

Which is the most important characteristic in determining an element's chemical properties? a. the number of protons b. which period it is found...

Which metalloid is in the fourth period and the same group as carbon?

Which metalloid is in the fourth period and the same group as carbon? a. silicon b. germanium c. tin d. boron Answer:...

Which is the halogen that is in period 5?

Which is the halogen that is in period 5? a. bromine b. strontium c. iodine d. xenon Answer:...

Which correctly describes elements in the same group?

Which correctly describes elements in the same group? a. they have the same number of valence electrons b. they have the electrons in the same outermosst...

Which is defined as the energy required to remove an electron from an atom of an element in the gaseous state?

Which is defined as the energy required to remove an electron from an atom of an element in the gaseous state? a. ionization energy b. electronegativity c....

Which element is the most metallic?

Which element is the most metallic? a. A b. B c. C d. D Answer:...

Which category of elements is commonly used to make computer chips and solar cells due to their ability to conduct electricity only under certain conditions?

Which category of elements is commonly used to make computer chips and solar cells due to their ability to conduct electricity only under certain conditions? a....

Which category of elements have the property of being malleable and ductile?

Which category of elements have the property of being malleable and ductile? a. gases b. metals c. metalloids d. non metals Answer:...

How many valence electrons are present in silicon?

How many valence electrons are present in silicon? a. one b. two c. four d. six Answer:...

Which of these elements has 5 valence electrons?

Which of these elements has 5 valence electrons? a. boron (b) b. rubidium (rb) c. vanadium (v) d. arsenic (as) Answer:...

Which is the correct electron configuration for the element Molybdenum (Mo)?

Which is the correct electron configuration for the element Molybdenum (Mo)? a. 1s2 2s2 2p6 3s2 3p6 4s2 3d4 b. 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s6 c....

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d4?

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p6 4s2 3d4? a. titanium (ti) b. chromium (cr) c. sulfer (s) d. selenium (se) Answer:...

Which is the correct number of valence electrons in the element surfer (S)?

Which is the correct number of valence electrons in the element surfer (S)? a. 16 b. 6 c. 2 d. 4 Answer:...

Which is the correct number of valence electrons in the element Gallium (Ga)?

Which is the correct number of valence electrons in the element Gallium (Ga)? a. 13 b. 31 c. 1 d. 3 Answer:...

How many electrons are in a Al3+ ion?

How many electrons are in a Al3+ ion? a. 13 b. 10 c. 16 d. 12 Answer:...

What would be the total number of electrons for H+ ion?

What would be the total number of electrons for H+ ion? a. 0 b. 2 c. 1 d. 3 Answer:...

According to the graph, what is the approximate half-life of carbon-14?

According to the graph, what is the approximate half-life of carbon-14? a. 5.7 years b. 35 years c. 5,700 years d. 35,000 years Answer:...

An industrially important element contains 26 electrons and rusts in the presence of air and moisture. Identify the element.

An industrially important element contains 26 electrons and rusts in the presence of air and moisture. Identify the element. a. aluminum b. iron c....

An atom has 23 protons and 29 neutrons. Which is the correct chemical symbol for this atom?

An atom has 23 protons and 29 neutrons. Which is the correct chemical symbol for this atom? a. 29/6 C b. 52/23 Cu c. 29/23 V d. 52/23 V Answer:...

Which element has 7 protons?

Which element has 7 protons? a. nitrogen b. silicon c. aluminum d. sulfer Answer:...

According to the modern concept of the atom, which are located in the nucleus of an atom?

According to the modern concept of the atom, which are located in the nucleus of an atom? a. electrons and protons b. protons only c. neutrons and...

Which is the correct symbol for the atom with 42 protons and 49 neutrons?

Which is the correct symbol for the atom with 42 protons and 49 neutrons? a. 49/43 In b. 91/42 Mo c. 91/49 Mo d. 91/42 In Answer:...

How many electrons are in an neutral atom of titanium?

How many electrons are in an neutral atom of titanium? a. 22 b. 11 c. 12 d. 23 Answer: ...

How many neutrons are in an atom of surfer?

How many neutrons are in an atom of surfer? a. 17 b. 16 c. 33 d. 32 Answer:...

Which one(s) have a mass of 1 amu?

Which one(s) have a mass of 1 amu? a. electron b. proton c. proton and neutron d. electron and proton Answer:...

Which has a charge of +1?

Which has a charge of +1? a. proton b. atom c. electron d. neutron Answer:...

A 75.00-grams sample of an unknown compound contains 13.60 g of oxygen. What is the percentage by mass of oxygen in the compound?

A 75.00-grams sample of an unknown compound contains 13.60 g of oxygen. What is the percentage by mass of oxygen in the compound? a. 88.60% b....

A 20.0-gram sample of magnesium oxide contains 16.2 grams of magnesium. What is the percent of oxygen by mass in this compound?

A 20.0-gram sample of magnesium oxide contains 16.2 grams of magnesium. What is the percent of oxygen by mass in this compound? a. 81% b. 19% c....

The Law of Conservation of Mass states that mass is neither created nor destroyed in an ordinary chemical reaction. When an iron nail rusts, it seems to get heaveir in mass. Does the iron nail follow the Law of Conservation of Mass?

The Law of Conservation of Mass states that mass is neither created nor destroyed in an ordinary chemical reaction. When an iron nail rusts, it seems...

When sodium chloride reacts with calcium oxide to form sodium oxide plus calcium oxide, which of the following equations best illustrates the Law of Conservation of Mass?

When sodium chloride reacts with calcium oxide to form sodium oxide plus calcium oxide, which of the following equations best illustrates the Law of...

A 76.00-gram sample of an unknown compound contains 12.90 g of sulfur. What is the percentage by mass of sulfur in the compound?

A 76.00-gram sample of an unknown compound contains 12.90 g of sulfur. What is the percentage by mass of sulfur in the compound? a. 0.17% b. 16.97% c....

A chemical composition of two or more different elements joined together in fixed proportions is known as a(n)

A chemical composition of two or more different elements joined together in fixed proportions is known as a(n) a. compound b. element c. homogeneous...

Which of the following substances is a mixture?

Which of the following substances is a mixture? a. baking soda b. gasoline c. salt d. sugar Answer:...

Which of the following substances is an element?

Which of the following substances is an element? a. baking soda b. iron c. salt d. sugar Answer:...

Which technique ses a porous barrier to separate a solid from a liquid?

Which technique ses a porous barrier to separate a solid from a liquid? a. chromaatography b. crystallization c. distillation d. filtration Answer:...

The law of conservation of mass states that during a chemical reaction, total mass is ___?

The law of conservation of mass states that during a chemical reaction, total mass is ___? a. created b. the same c. destroyed d. utilized Answer:...

Matter that has a uniform and unchanging composition is know as a(n)

Matter that has a uniform and unchanging composition is know as a(n) a. compound b. element c. mixture d. substance Answer:...

A 25.0-gram of magnesium oxide contains 10.8 grams of magnesium. What is the percent of oxygen by mass in this compound?

A 25.0-gram of magnesium oxide contains 10.8 grams of magnesium. What is the percent of oxygen by mass in this compound? a. 89.2% b. 14.2% c. 43.2% d....

Which is a compound?

Which is a compound? a. sodium b. sea water c. carbon dioxide d. brass Answer:...

Which is the seperation technique that identifies parts of a mixture based on how fast different compounds move across a material?

Which is the seperation technique that identifies parts of a mixture based on how fast different compounds move across a material? a. filtration b....

Which is the separation technique that relies on the different boiling points of the parts of the mixture?

Which is the separation technique that relies on the different boiling points of the parts of the mixture? a. filtration b. distillation c....

Which is an example of a homogeneous mixture?

Which is an example of a homogeneous mixture? a. sand b. clean air c. vegetable soup d. fresh-squeezed juice Answer: B...

An 8.00-g sample of aluminum reacts with ixygen to form 15.20 g of aluminum oxide. How many grams of oxygen are used in the reaction?

An 8.00-g sample of aluminum reacts with ixygen to form 15.20 g of aluminum oxide. How many grams of oxygen are used in the reaction? a. 1.50 g b....

According to the law of conservation of mass, in any chemical change?

According to the law of conservation of mass, in any chemical change? a. the mass of reactants is greater than the mass of products b. the mass of...

Which of the following formations is a physical property of copper?

Which of the following formations is a physical property of copper? a. a deep blue solution when in contact with ammonia b. a new substance when...

Matter that has a uniform and unchanging composition is known as a(n)

Matter that has a uniform and unchanging composition is known as a(n) a. compound b. element c. mixture d. substance Answer: D...

Which is a chemical property of copper?

Which is a chemical property of copper? a. has a boiling point of 2567 degrees C b. reacts in air to form a green layer c. has the symbol Cu d....

Which is not a chemical change?

Which is not a chemical change? a. a piece is burned b. an egg is cooked c. a bar of iron rusts d. ingredients for a cake are stirred together Answer:...

Which is the state change in which a gas becomes a liquid?

Which is the state change in which a gas becomes a liquid? a. sublimation b. freezing c. condensation d. melting Answer: C ...

Which is the state change in which a solid becomes liquid?

Which is the state change in which a solid becomes liquid? a. liquefaction b. melting c. condensation d. sublimation Answer: B ...

Which is the state of matter that has a indefinite shape and indefinite volume?

Which is the state of matter that has a indefinite shape and indefinite volume? a. solid b. liquid c. gas d. plasma Answer:...

Which is the state of matter that has a indefinite shape and definite volume?

Which is the state of matter that has a indefinite shape and definite volume? a. solid b. liquid c. gas d. plasma Answer: B ...

Which is the state of matter that has a definite shape and definite volume?

Which is the state of matter that has a definite shape and definite volume? a. solid b. liquid c. gas d. plasma Answer: A...

A box is 25 cm long, 6 cm wide, and 4 cm high. How many cubic centimeters of water can it hold?

A box is 25 cm long, 6 cm wide, and 4 cm high. How many cubic centimeters of water can it hold? a. 600 b. 25 c. 150 d. 24 Answer:...

A beaker contains 0.32 L of water. What is the volume of this water in milliters?

A beaker contains 0.32 L of water. What is the volume of this water in milliters? a. 320 mL b. 3.2 mL c. 32 mL d. 0.32 mL Answer:...

How many meters are there in 1,865 cm?

How many meters are there in 1,865 cm? a. 0.1865 b. 1.865 c. 18.65 d. 186.5 Answer: C ...

The SI unit that is used to measure time is the___?

The SI unit that is used to measure time is the___? a. kelvin b. kilogram c. second d. meter Answer: C ...

Which is the product of these numbers, to the appropriate number of significant digits? 56.2 x 9.2057 =

Which is the product of these numbers, to the appropriate number of significant digits?56.2 x 9.2057 = a. 517 b. 517.4 c. 517.36 d. 517.00 Answer:...

Which is the sum of these values, to the appropriate number of significant digits? 17.358 + 3.502 + 20.140 =

Which is the sum of these values, to the appropriate number of significant digits?17.358 + 3.502 + 20.140 = a. 41 b. 41.00 c. 41.000 d. 41.0 Answer:...

Which is correct conversion for a temperature of 67.3 degrees C?

Which is correct conversion for a temperature of 67.3 degrees C? a. -205.7 K b. 121.1 degrees F c. 153.1 degrees F d. 19.6 degrees F Answer:...

The accepted value for the density of iron is 7.87% g/cm cubed. A student records the mass of a 20.00-cm cubed block of iron as 153.8 grams. What is the percent error for the density measurement?

The accepted value for the density of iron is 7.87% g/cm cubed. A student records the mass of a 20.00-cm cubed block of iron as 153.8 grams. What is...

Using a universal system of measurement is most important during which part of scientific methodology?

Using a universal system of measurement is most important during which part of scientific methodology? a. asking questions b. forming a hypothesis c....

The standard english system of measurement uses units such as yards, miles, quarts, and gallons. The metric system uses units such as meters, kilometers, millimeters, and liters. Why is the metric system easier to use than the english system?

The standard english system of measurement uses units such as yards, miles, quarts, and gallons. The metric system uses units such as meters, kilometers,...