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Question

Number of moles of water present in $$720$$ grams of water is:


A
4
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B
10
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C
30
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D
40
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Solution

The correct option is D 40
Number of moles of water $$= \dfrac {mass \ of \ water} {molecular \ weight \ of \ water} = \dfrac {720} {18} = 40$$

Chemistry

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