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Question

The volume occupied by one molecule of water (density 1 g/cm3) is:

A
18cm3
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B
22400cm3
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C
6.023×1023cm3
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D
3.342×1023cm3
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Solution

The correct option is D 3.342×1023cm3
The density of water is approximately 1g/cm3. 1 gram of water is 1/18.02 moles, or 0.05549mol. 0.05549 mol of water contains 0.05549×6.022×1023 molecules, or 3.342×1023 molecules.

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