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27 Jan 1754 Jahr - Joseph Louis Proust The Law of Definite Proportions, sometimes called The Law of Constant Composition, states that a chemical compound always contains exactly the same proportion of elements by mass.

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History of chemistry

ByDina Bawazeer
14 Nov 2018

Datum:

27 Jan 1754 Jahr
Jetzt
~ 270 years ago
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