What is the Law of the Conservation of Mass

The law of conservation of mass states that

“The mass in an isolated system can neither be created nor be destroyed but can be transformed from one form to another”.

According to the law of conservation of mass, the mass of the reactants must be equal to the mass of the products for a low energy thermodynamic process.

Explanation:

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law of conservation of matter states that mass in an isolated system can neither be created nor destroyed by chemical reactions or physical transformation.

thus, the mass of the reactants in a reaction must be equal to the mass of the products

I think it might be 159g