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Question

1 mole of N2 has _____ number of atoms


A
6.022 × 1023
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B
3.011 × 1023
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C
12.044 × 1023
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D
6.022 × 1022
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Solution

The correct option is C 12.044 × 1023

N2 is a diatomic gas. Hence, the smallest unit of N2 gas is a N2molecule.
∴ 1 mole of N2 gas = 6.022 × 1023 molecules of N2

Since each molecule of N2 has 2 atoms, 1 mole of N2 gas = 2 × 6.022 × 1023 atoms of N2.


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