Question

State and explain law of conservation of mass?

Answer 1

it states that matter is neither created nor destroyed during any physical or chemical changes.

Answer 2

Answer:

during chemical combination of matter, the mass is neither created nor destroyed.

Explanation : Lavoisier while studying several combustion reactions, determined accurately the masses of the reactants before reactions and the masses of the products after the completion of the reactions. He observed that the total masses of the reactants before the reaction were in the agreement with the total masses of the products.

Applications:

(1) From the masses of the reactants taken, the masses of products that would be obtained in a chemical reaction can be predicted.

(2) Amounts of the reactants can be decided from the required amounts of the products.