A) 25
B) 100
C) 50
D) \[100\times 6\times {{10}^{-23}}\]
Correct Answer: A
Solution :
Number of atoms of a substance = Number of gram molecular weight\[=6.02\times {{10}^{23}}\times \] atomicity \[=\frac{weight\text{ }of\text{ }substance}{number\text{ }of\text{ }gram\text{ }molecules}\times 6.02\times {{10}^{23}}\] \[\times \] atomicity (\[\because \] \[1\,\,u=1.6\times {{10}^{-24}}g\] \[100\,\,u=1.6\times 100\times {{10}^{-24}}g\]) \[=\frac{100\times 1.6\times {{10}^{-24}}}{4}\times 6.023\times {{10}^{23}}\times 1\] \[=25\times 1.6\times {{10}^{-24}}\times 6.023\times {{10}^{23}}\] = 25
You need to login to perform this action.
You will be redirected in
3 sec
