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Atoms and Molecules
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12/11/2021 4:25 pm
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State the law of constant proportions. Give one example to illustrate this law.
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12/11/2021 4:26 pm
Joseph Proust put forward law of proportion in 1779. This law states that the chemical compound always consists of the same elements combined together in the same proportion by mass.
It means, a pure chemical compound is always made up of the same elements in the same percentage.
For example: Carbon dioxide exists in nature in different forms and can be chemically produced in different ways. Yet, all the different samples of carbon dioxide will always contain the same elements. i.e. carbon and oxygen is in the same proportion by mass 3 : 8.