Question

describe briefly about law of conservation of mass

Answer 1

'Matter is neither created nor destroyed'.In a chemical reaction , reactants are neither created nor the destroyed .

Answer 2

the law of conservation of mass states that mass can neither be created nor destroyed.
               in other words in a chemical reaction the total mass of the reactant is always equal to the total mass of the product. the mass is always conserved in a chemical reaction.
     i hope that this will help u.