The experiment requires 13.2 grams of carbon dioxide, which is prepared by the reaction of calcium carbonate and sufficient dilute hydrochloric acid. How much calcium carbonate is needed

The experiment requires 13.2 grams of carbon dioxide, which is prepared by the reaction of calcium carbonate and sufficient dilute hydrochloric acid. How much calcium carbonate is needed

CaCO3+2HCl=CaCl2+H2O+CO2↑
44gco2 was obtained by the reaction of 100gcaco3
Now 13.2gco2 is required, so CaCO3 13.2 / 44 * 100 = 30g