A) \[0.6708\text{ }g\text{ }c{{m}^{-2}}\]
B) \[1.6708\text{ }g\text{ }c{{m}^{-3}}\]
C) \[2.6708\text{ }g\,\,c{{m}^{-3}}\]
D) None of these.
Correct Answer: A
Solution :
[a] \[d=\frac{ZM}{{{a}^{3}}{{N}_{A}}}=\] \[\frac{4\times 21.76}{6.8\times {{10}^{-8}}\times 4.4\times {{10}^{-8}}\times 7.2\times {{10}^{-8}}\times 6.023\times {{10}^{23}}}\] \[=0.6708\,g\,c{{m}^{-2}}\]
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