How many grams of CO2 are evolved on heating 200 g of CaCO3.

Answer 1

? gms CO2 from decomposition of 200 gms of CaCO3.

CaCO3 => CaO + CO2
moles CaCO3 = (200g/100g/mol) = 2 mol
2mol(CO2) => 2mol(CaO) + 2mol(CO2)
2mol(CO2) = 2mol(CO2)(44g/mol) = 88gms CO2.