The vapour density of fully dissociated `NH_(4)Cl` would be

The vapour density of compeletly disssociated NH_4Cl would be :

The vapour density of pure ozone would be :

The experimental values of the vapour density of either NH_(4)Cl or PC l_(5) is less than that obtained from the equation D=M//s . Explain.

When PCl_(5) is heated, it dissociates into PCl_(3) and Cl_(2) . The vapour density of the gas mixture at 200^(@)C and at 250^(@)C is 70 and 58 , respectively. Find the degree dissociation at two temperatures.