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One mole of H2O corresponds to ________

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Important Questions on Some Basic Concepts of Chemistry

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1 g atom of nitrogen represents ___________.
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 How many moles of electrons weigh one kilogram? 
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Which of the following has the maximum number of atoms?
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The number of sulphur atoms present in 0.2 moles of S8 molecule is _________________________.
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The ratio of masses of oxygen and nitrogen in a particular gaseous mixture is 1:4. The ratio of their number of molecules is
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The weight of 112 mL of oxygen at NTP on liquefaction would be
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The number of moles of sodium oxide in 620 g is _______.
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The number of water molecules in 1 litre of water is __________