Caesium chloride may be considered to form interpenetrating simple primitive cubic crystals.The edge length of unit cell is 412pm.Determine the density of CsCl.Given :M(Cs)=$133gmol^{-1}$

Question

$\begin{array}{1 1}4.0gcm^{-3}\\3.0gcm^{-3}\\4.2gcm^{-3}\\2.0gcm^{-3}\end{array} $