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Law of Constant Proportions

what is the r...

Question

what is the ratio of mass of hydrogen to the mass of oxygen in a molecule of water?

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Solution

The chemical formula of water is H₂O. The total mass of hydrogen in a molecule of water is 2 u, while that of oxygen is 16u. Thus the ratio of masses of hydrogen to oxygen is 2 : 16 = 1 : 8.

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