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The total number of valence electrons in...

The total number of valence electrons in `4. 2g` of ` N_3^-` ion are :

A

`1.6 N_A`

B

`3.2 N_A`

C

`2.1 N_A`

D

`4.2 N_A`

Text Solution

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The correct Answer is:
A
(a) `42 g` of `N^(-)._3` ion has `16 N_A` valence electrons , `4.2 g` of `N^(-)._3` ion have `= (16 N_A)/(42) xx 4.2 = 1.6 N_A`.
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