A compound forms hexagonal close-packed structure. What is the total number of voids in 0.5 mol of it? How many of these are tetrahedral voids?

Explanation

No. of atoms in 0.5 mole of the compound `=0.5xxN_(0)=0.5xx6.022xx10^(23)=3.011xx10^(23)`
No. of octahedral voids = No. of atoms `=3.011xx10^(23)`
No. of tetrahedral voids `=2xx3.011xx10^(23)=6.022xx10^(23)`
Total no. of voids = `(3.011+6.022)xx10^(23)=9.033xx10^(23)`