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Question

How many moles of oxygen atoms are present in 1 gram molecule of N2O5?

A
1 mol
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B
5 mol
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C
2 mol
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D
10 mol
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Solution

The correct option is B 5 mol
1 gram-molecule of N2O5=6.022×1023molecules of N2O5=1 mole of N2O5

1 mole of N2O5 contains 5 moles of oxygen.
5 moles of oxygen atoms are present in 1 gram-molecule of N2O5.

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