Chemistry - Chemical Equilibrium Question with Solution | TestHub

Gaseous${\mathrm{N}}_2{\mathrm{O}}_4$dissociates into gaseous$\mathrm{N}{\mathrm{O}}_2$according to the reaction${\mathrm{N}}_2{\mathrm{O}}_4\left(\mathrm{g}\right)\rightleftharpoons 2\mathrm{N}{\mathrm{O}}_2\left(\mathrm{g}\right)$
At$300 \mathrm{K}$and$1 \mathrm{atm}$pressure, the degree of dissociation of${\mathrm{N}}_2{\mathrm{O}}_4$is$0.2$. If one mole of${\mathrm{N}}_2{\mathrm{O}}_4$gas is contained in a vessel, then the density of the equilibrium mixture is$:$