20 grams of CaCO3 is heated, how much calcium oxide will produce?

20-grams-of-caco3-is-heated-how-much-calcium-oxide-will-produce

20 grams of CaCO3 is heated, how much calcium oxide will produce?
A. 5.6 grams
B. 11.2 grams
C. 22.4 grams
D. 44.8 grams
Right choice is B. 11.2 grams

The balance chemical reaction is CaCO3 -> CaO + CO2, moles of CaO = moles of CaCO3 = 20/100 = 0.2, => amount of CaO = 0.2*56 = 11.6 grams.