Question

The total number of electrons present in 4.2 g of N^- 3 ion is

Answer 1

Answer:

N3− = 4.2g =144.2moles =0.3 moles

1 mole of N3− contains 10NA electrons.

∴ 0.3 moles of N3− contains 0.3×10NA electrons.

=3NA electrons

Answer 2

Answer:

3 moles

Explanation:

Number of electrons contained by one atom is 10. So, the total no. of electrons carried by one mole is 10 electrons. Hence, the correct answer is Option A i.e. 3 moles of electrons.

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