Question

example of law of conservation of mass and law of constant composition

Answer 1

During any physical and chemical change total mass of products is equal to total mass of reactant                ex Nacl + AgNO3    ->    NaNO3 + AgCl                                                            total mass of product = total mass of reactant .this is law of conservation of mass

Answer 2

law of conservation of mass states that energy can neither be created nor be destroyed it can be transformed from one form to another.