228.8 g of CO2
228.8 g
15.2 g CaCO3 / 100.1 g CaCO3 x 22.4 L (STP)=3.40 L
Its hard to tell from the way you wrote it, but if its supposed to be CaCo3---> CaO + CO2, then CaCo3 is the reactant and CaO and CO2 are the products. Its simply that the elements on the left of the arrow are reactants and the ones on the right are products.