A 0345g sample of caco3 heterogeneous mixture was placed

Question

A 0.345g sample of CaCO₃ heterogeneous mixture was placed into a gas generator, the total mass of which is 87.719g. The mass of gas generator after reaction was 87.642g

CaCO₃(s) + 2H₃O⁺ (aq) à Ca²⁺(aq) +3H₂O(l) + CO₂ (g)

CO₂ Atomic Mass  44.0g/mol

CaCO₃ Atomic Mass 100.1g/mol

What is the percent by mass of CaCO₃ in the original mixture?

NOTE: YOU DO NOT HAVE to MAKE CORRECTIONS FOR DRY CO2

A. 64.3%

B. 63.4%

C. 50.7%

D. 53.7%