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Question

Number of H atoms in 34 kg NH3 gas are:

A
3.6×1027
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B
6×1023
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C
18×1023
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D
6×1027
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Solution

The correct option is A 3.6×1027
1 mol NH3=17 g
17 g contain 3×6×1023H atoms
Then,
34 g contain 6×6×1023H atom
Therefore,
34 kg contain 36×1023×103H atoms
Number of H atoms in 34 kg of NH3=3.6×1027

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