Question

50gram of caco3 was completely burnt in air what is weight in g of residue

Answer 1

Explanation:

CaCO3 --------> CaO + CO2

1 mole. 1mole. 1 mole

100g. 56g. 44 g

50g. x g. y g

x is 28g

y is 22g

residue is CaO so it's weight is 28g