Question

the sum of masses of rectans product is equal in any physical and chemical rections this is according with of law​

Answer 1

Answer:

According to law of conservation of mass, the mass of products in a reaction must be equal to mass of reactants so the balancing of equations is done to obey this law.

Explanation:

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Answer 2

Answer:

According to the law of conservation of mass, the mass of the products in a chemical reaction must equal the mass of the reactants.