Question

How many octahedral void are there in 1mole of compound having cubic closed packed structure

Answer 1

no. of octahedral voids is equal to no. of atoms involved in CCP structure.
so,
$1 \: mole \: = 6.022 \times {10}^{23}$
Thus,
$6.022 \times {10}^{23} otctahedral \: voids \: are \: formed$