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Which of the following best explains the law of conservation of mass?

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Mass is sometimes destroyed in chemical reactions.

Mass is sometimes created in chemical reactions.

Mass is only created in physical changes.

Mass can neither be created nor destroyed in a chemical reaction.

answer is C.

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Detailed Solution

The law of conservation of mass states that the mass of the reactants equals the mass of the products in a chemical reaction, meaning no mass is lost or gained.

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