Solid State Question 15
Question: The number of unit cells in 58.8 g of $ NaCl $ is nearly
Options:
A) $ 6\times 10^{20} $
B) $ 3\times 10^{22} $
C) $ 1.5\times 10^{23} $
D) $ 0.5\times 10^{24} $
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Answer:
Correct Answer: C
Solution:
[c] Number of unit cells $ =\frac{N _{A}\times Wt.ofsubstance}{M.Wt.\times Z} $
$ =\frac{6.023\times 10^{23}\times 58.8}{58.8\times 4}=1.5\times 10^{23} $
BETA
