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What is the correct answer?
4
The number of molecules in 4.25 gm of ammonia are approximately
A.
0
.
5
×
10
23
B.
1
.
5
×
10
23
C.
2
.
5
×
10
23
D.
3
.
5
×
10
23
Correct Answer :
B.
1
.
5
×
10
23
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