A) \[1\times {{10}^{25}}\]
B) \[2\times {{10}^{25}}\]
C) \[3\times {{10}^{25}}\]
D) \[4\times {{10}^{25}}\]
Correct Answer: D
Solution :
[d] \[M=\frac{\rho \times {{a}^{3}}\times {{N}_{A}}\times {{10}^{-30}}}{4}\] \[=\frac{10\times {{(100)}^{3}}\times 6.02\times {{10}^{23}}\times {{10}^{-30}}}{4}=15.05\] \[\therefore \] Number of atoms in 100 g \[=\frac{6.02\times {{10}^{23}}}{15.05}\times 100=4\times {{10}^{25}}\]
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