A) \[40\,g\,mo{{l}^{-1}}\]
B) \[30\,g\,mo{{l}^{-1}}\]
C) \[27\,g\,mo{{l}^{-1}}\]
D) \[20\,g\,mo{{l}^{-1}}\]
Correct Answer: C
Solution :
[c] Given, cell is fee, so Z = 4 |
Edge length, a = 404 pm = 4.04 x 10-8 cm |
Density of metal, \[d=2.72\,g\,c{{m}^{-3}}\] |
\[{{N}_{A}}=6.02\times {{10}^{23}}mo{{l}^{-1}}\] |
Molar mass of the metal, M = ? |
We know that density, \[d=\frac{Z\times M}{{{a}^{3}}\cdot {{N}_{A}}}\] |
\[\therefore \]\[M=\frac{d\cdot {{a}^{3}}\cdot {{N}_{A}}}{Z}\] |
\[=\frac{2.72\times {{(4.04\times {{10}^{-8}})}^{3}}\times 6.02\times {{10}^{23}}}{4}\] |
\[=27\,g\,mo{{l}^{-1}}\] |
You need to login to perform this action.
You will be redirected in
3 sec