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What is Law of conservation of mass and Law of constant proportions?

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Law of conservation of mass: Mass neither be created nor be destroyed. In chemical processes, Total mass of the reactants=Total mass of products Law of constant proportions: A given compound always contains exactly the same proportion of elements by weight. Example: %of cu. ...
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Law of conservation of mass: Mass neither be created nor be destroyed. In chemical processes, Total mass of the reactants=Total mass of products Law of constant proportions: A given compound always contains exactly the same proportion of elements by weight. Example: %of cu. %of O2. %of Carbon Natural sample 51.35. 9.74. 38.91 Artoficial. 51.35. 9.74. 38.91 Therefore composition of elements in the two sample of CuCO3 are equal This law was proposed by Proust read less
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