Question 131 of 132

CsBr crystallises in a body centred cubic lattice. The unit cell length is 436.6 pm. Given that the atomic mass of Cs = 133 and that of Br = 80 amu and Avogadro number being 6.02x 1023 mol-1, the density of CsBr is :

(a) 42.5 g/cm3

(b) 0.425 g/cm3

(c) 8.25 g/cm3

(d) 4.25 g/cm3