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Question

Find the number of moles of NO2 molecules in a sample containing 3.011×1023 molecules of NO2.

A
0.05 moles
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B
0.5 moles
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C
2 moles
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D
0.25 moles
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Solution

The correct option is B 0.5 moles
We know,
6.022×1023 molecules of NO2=1 mole of NO2
So, 3.011×1023 molecules of NO2
=3.011 × 10236.022 × 1023 moles = 0.5 moles of NO2

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