Question

calculate the amount of calcium oxide produced by the de composition of 20 g of calcium carbonate

Answer 1

1 mol CaCO₃=100g
0.2 mol CaCO₃= 20g
CaCO₃→CaO+CO₂
So all products will be 0.2 mol
Mass of 0.2 mol CaO=0.2*(40+16)
                                 =0.2*56
                                 =11.2g