CsCl has bcc structure . If atomic mass of Cs and Cl atom is 133 and 35.5 amu respectively , what would be correct about its unit cell ?
A. Number of formula unit (z) =1
B. Number of formula unit (z) =2
C. Mass of unit cell= `"370 g mol"^(-1)`
D. Mass of unit cell= `"168.5 g mol"^(-1)`