Question

10g of caco3 on complete decomposition gives 4.4g of co2. what will be the mass of the residue left behind?(a)14.4g (b)5.6g (c)44g (d)4.4g

Answer 1

b) 5.6 g residue will be left as due to law of conservation of mass, total mass of reactants = total mass of products
therefore 10g CaCO3 = 4.4 g CO2 + 5.6 g CaO