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Law Of Definite Proportions Law Of Constant Composition

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What is Law Of Definite Proportions Law Of Constant Composition?

The law of definite proportions (law of constant composition) states that a given chemical compound always contains the same elements in the same fixed ratio by mass, regardless of the source or method of preparation. For example, water always consists of 11.19% hydrogen and 88.81% oxygen by mass. This law, formulated by Joseph Proust in 1797, was one of the cornerstones of Dalton's atomic theory and distinguishes pure compounds from mixtures.

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Term Law Of Definite Proportions Law Of Constant Composition
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The law of definite proportions (law of constant composition) states that a given chemical compound always contains the same elements in the same fixed ratio by mass, regardless of the source or method of preparation. For example, water always consists of 11.19% hydrogen and 88.81% oxygen by mass. This law, formulated by Joseph Proust in 1797, was one of the cornerstones of Dalton's atomic theory and distinguishes pure compounds from mixtures.

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