in chemical reactions, what does the principle of conservation of mass mean?

the total mass of the reactants is greater than the total mass of the products.

matter is not changed.

the total mass of the reactants is less than the total mass of the products.

matter is not created or destroyed.

This law states that, despite chemical reactions or physical transformations, mass is conserved — that is, it cannot be created or destroyed — within an isolated system. In other words, in a chemical reaction, the mass of the products will always be equal to the mass of the reactants.

Explanation:

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