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Question

Any sample of pure water, irrespective of its source, contains 88.89% oxygen and 11.11 % hydrogen by mass. The data supports the:

A
Law of conservation of mass
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B
Law of constant composition
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C
Law of multiple proportion
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D
Law of reciprocal proportion
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Solution

The correct option is C Law of constant composition
The ratio of the mass of hydrogen to the mass of oxygen is
always 1:8, whatever the source of water.
mass of hydrogenmass of oxygen=11.1188.89=1:8
Hence the given data supports law of Constant proportion.

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