# The mass of calcium oxide that is obtained by the decomposition of 300 g of calcium carbonate.

July 29, 2021 | education

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

CaCO3 = CaO + CO2 ↑;

Let’s calculate the chemical amount of calcium carbonate (limestone). To do this, divide its weight by the mass of 1 mole of the substance.

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

N CaCO3 = 300/100 = 3 mol;

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

To calculate its volume, you need to multiply the amount of substance by the volume of 1 mole of gas (filling volume 22.4 liters).

V CO2 = 3 x 22.4 = 67.2 liters;

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