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?
a. NaCl + CaCo --> Na2O + Ca Cl2
b. 4 NaCl + CaO --> 2 Na2O + CaCl2
c. 2 NaCl + CaCo --> Na20 + CaCl2
d. 3 NaCl +2 CaCo --> Na2O + 3 CaCl2
Answer: C