Name the scientists who proposed the law of conservation of mass and law of constant proportions.
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It's Antoine Lavoisier
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(a) Law of conservation of mass was given by Antoine Lavoisier in 1744. According to this law, "Matter can neither be created nor destroyed in a chemical reaction."
(b) Law of constant proportions was given by Joseph Proust in 1799. According to this law, *A chemical compound always contains same elements in definite proportion by mass and it does not depend on the source of compound."
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