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Chemistry
If NA is Avogadro's number then number of valence electrons in 4.2 g of nitride ions N3- is
Q. If
N
A
is Avogadro's number then number of valence electrons in 4.2 g of nitride ions
N
3
−
is
2510
206
Some Basic Concepts of Chemistry
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A
2.4
N
A
50%
B
4.2
N
A
22%
C
1.6
N
A
21%
D
3.2
N
A
7%
Solution:
14
g
of
N
3
−
ions have valence electrons
=
8
N
A
4.2
g
of
N
3
−
ions have valence electrons
=
14
8
N
A
×
4.2
=
2.4
N
A