Question

120 kg of 90% pure limestone ( caco3) is heated . How many kilograms of Cao will be obtained?

Answer 1

Pure limestone = 120 * 90/100 = 108 kg

CaCO3 ——> CaO + CO2
100g of CaCO3 gives 56g of CaO
108kg of CaCO3 will give = 108 * 56/100
= 60.48 kg of CaO