Chemistry - Chemical Equilibrium Question with Solution | TestHub

$$\begin{array}{c}{\text{PCl}}_{\text{5}}\text{(molecular}\text{mass}\text{=}\text{M)}\text{dissociates}\text{into}{\text{PCl}}_{\text{3}}\text{and}{\text{Cl}}_{\text{2}}\text{as:}{\text{PCl}}_{\text{5}}\text{(g)}\rightleftharpoons {\text{PCl}}_{\text{3}}\text{(g)}\text{+}\\ {\text{Cl}}_{\text{2}}\text{(g).}\text{If}\text{the}\text{total}\text{pressure}\text{of}\text{the}\text{system}\text{at}\text{equilibrium}\text{is}\text{P}\text{and}\text{the}\text{density}\\ \text{is}\text{’d’}\text{at}\text{temperature,}\text{T}\text{K,}\text{the}\text{degree}\text{of}\text{dissociation}\text{of}{\text{PCl}}_{\text{5}}\text{may}\text{be}\\ \text{represented}\text{as}\end{array}$$