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Question

Which is/are the correct statement(s) about 1.7 g of NH3?

A
It contains 0.3 mol of H-atom
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B
It contains 2.408×1023 atoms
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C
Mass % of hydrogen is 17.65%
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D
Vapour density of NH3 is 17
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Solution

The correct option is C Mass % of hydrogen is 17.65%
Moles of NH3=1.717=0.1 ; Moles of H atom =0.3
Total atoms =0.4×6.02×1023=2.408×1023
Mass %H=3×117×100=17.65%

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