Question

What is law of conservation of mass.

Answer 1

mass can neither be created nor destroyed during a chemical reaction.

hope it will help u

Answer 2

Law of coservation of Mass :According to Dalton's atomic therory, atoms neither be created nor be destroyed.Since atom neither be created and nor be destroyed therefore the number of various types of atoms in the products of a chemical reaction is the same as the number of all those atoms in the reactants. The same number of various atoms in products and reactants will have the same mass.So,total mass of products is equal to the mass of reactants.The mass remains same or conserved in a chemical reaction. And this is the law of conservation of mass.
Thank you