Question

what is the conservation of mass​

Answer 1

Answer:

a principle in classical physics: the total mass of any material system is neither increased nor diminished by reactions between the parts. — called also conservation of matter, law of conservation of matter

Explanation:

Answer 2

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The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. ... If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system....