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(N/A) The Law of Definite Proportions was proposed by the French chemist $Joseph \ Proust$. He stated that a given chemical compound always contains e

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(N/A) The Law of Definite Proportions was proposed by the French chemist $Joseph \ Proust$. He stated that a given chemical compound always contains exactly the same proportion of elements by weight,regardless of its source or method of preparation.
$Proust$ worked with two samples of cupric carbonate $(CuCO_3)$—one of natural origin and the other synthetic. He found that the composition of elements present in both samples was identical,as shown in the table below:

Sample Type	$\% \text{ of Copper}$	$\% \text{ of Carbon}$	$\% \text{ of Oxygen}$
Natural sample	$51.35$	$9.74$	$38.91$
Synthetic sample	$51.35$	$9.74$	$38.91$

Thus,irrespective of the source,a given compound always contains the same elements in the same proportion by mass. This law is also known as the Law of Definite Composition.

Explain the Law of Definite Proportions with examples.

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