Question

Q. The density of KBr is 2.75 g / cm3. Thr length of the edge of the unit cell is 654 pm. Show that KBr has a face centered cubic structure.

Answer 1

To show that KBr has a FCC structure we have to find the value of Z. The value of Z for FCC is 4.

we can use formula,

Z= d×Na×(a)^3 divided by molecular mass

here Na is Avogadro's no.
substitute values and you will found the value of Z comes out to be 4.

Hope you get your answer.