A compound is formed 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 close packings 0.5mol=`0.5xx6.022xx10^(23)=3.011xx10^(23)`
No. of octahedral voids =No. of atoms in packing =`3.011xx10^(23)`
No. of tetrahderal voids =2xx No. of atoms in packing
`=2xx3.011xx10^(23)=6.022xx10^(23)`
Total no. of voids `=3.011xx10^(23)+6.022xx10^(23)`
`=9.033xx10^(23)`