Lime, CaO, is produced by the decomposition reaction CaCO3(s) ® CaO(s) + CO2(g). What weight of CO2 is obtained by the decomposition of 38.7 g of CaCO3?

Question

Lime, CaO, is produced by the decomposition reaction CaCO3(s)  ®  CaO(s)  +  CO2(g). What weight of CO2 is obtained by the decomposition of 38.7 g of CaCO3?

DrBob222 · Answer

mols CaCO3 = grams/molar mass. Convert mols CaCO3 to mols CO2 using the coefficients in the balanced equation. Now convert mols CO2 to grams. g = mols x molar mass.