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Question

The total number of moles of valence electrons in 4.2g of N3 ion are:

A
2.2NA
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B
4.2NA
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C
1.6NA
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D
3.2NA
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Solution

The correct option is D 1.6NA
Since N3 has 16 valence electron

for 1 mole N3(16valencee×NA)
0.1moleN3(16×0.1)NA
1.6NA
Valence electron

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