At ${120}^{\mathrm{o}}\mathrm{C}$, the vapour pressure of pure chlorobenzene $\left({\mathrm{C}}_6{\mathrm{H}}_5\mathrm{Cl}\right)$ is 0.736 atm. What is the vapour pressure of a solution of 5.00 g of naphthalene $\left({\mathrm{C}}_{10}{\mathrm{H}}_8\right)$ in 50.0 g of chlorobenzene? (Assume that naphthalene is not volatile)