Find the mass of calcium oxide formed during the decomposition of 100 g of calcium carbonate.

The thermal decomposition reaction of calcium carbonate is described by the following chemical reaction equation:

CaCO3 = CaO + CO2 ↑;

Find the chemical amount of calcium carbonate (limestone). To do this, we divide its weight by the mass of 1 mole of the substance.

M CaCO3 = 40 + 12 + 16 x 3 = 100 grams / mol;

N CaCO3 = 100/100 = 1 mol;

The same molar amount of calcium oxide and carbon dioxide will theoretically be synthesized.

Find the weight of calcium oxide. To do this, we multiply the amount of the substance by the weight of 1 mole of the substance.

M CaO = 40 + 16 = 56 grams / mol;

m CaO = 1 x 56 = 56 grams;