Question

open-ended question what does the law of conservation of mass state?

Explanation:

The law of conservation of mass, a key concept in Chemistry (a subfield of Natural Science), states that in a closed system, mass is neither created nor destroyed during a chemical reaction. The total mass of the reactants is equal to the total mass of the products.

Answer:

The law of conservation of mass states that in a closed system, the total mass of substances before a chemical reaction (reactants) is equal to the total mass of substances after the reaction (products); mass is neither created nor destroyed during the reaction.