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2015-04-21T22:31:58+05:30

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39.966073244495995 will be the number of moles in 720 grams of water
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2015-04-22T01:16:41+05:30

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Molecular weight of Water : H2 O = 18

So 1 mole of water weighs 18 gm.
720 grams of water contains 720/18 = 40  moles.

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