Law of Conservation of Mass:

That law states that in a chemical reaction the whole mass of the products generation the total mass of the reactants. Antoine Lavoisier, that is a French chemist, exposed which while tin reacts along with air in a closed vessel; the weight of the vessel and its contents is the similar after the reaction as it was before. Scientists later creates that whereas energy (heat, light, radiation) is liberated in during a reaction, an extremely small modifications in mass does occur, other than this change is insignificant in normal chemical reactions.