Solid State Question 2
Question 2 - 29 January - Shift 2
A metal $M$ forms hexagonal close-packed structure. The total number of voids in $0.02 mol$ of it is $\times 10^{21}$ (Nearest integer)
(Given $N_A=6.02 \times 10^{23}$ )
Show Answer
Answer: (36)
Solution:
One unit cell of hcp contains $=18$ voids
No. of voids in $0.02 mol$ of hep
$=\frac{18}{6} \times 6.02 \times 10^{23} \times 0.02$
$\approx 3.6 \times 10^{22}$
$\approx 36 \times 10^{21}$
