What is the mass of calcium oxide produced by the decomposition of 250 kg of calcium carbonate?

1. We write down the reaction equation for the decomposition of calcium carbonate:

CaCO3 = CaO + CO2 ↑;

2.find the chemical amount of carbonate:

n (CaCO3) = m (CaCO3): M (CaCO3);

M (CaCO3) = 40 + 12 + 3 * 16 = 100 g / mol;

n (CaCO3) = 250: 100 = 2.5 kmol;

3.According to the reaction equation, the amount of decomposing carbonate and the resulting oxide are the same:

n (CaO) = n (CaCO3) = 2.5 kmol;

4.Calculate the mass of the resulting oxide:

m (CaO) = n (CaO) * M (CaO) = 2.5 * 56 = 140 kg.

Answer: 140 kg.