For the reaction $2\mathrm{NO}\left(\mathrm{g}\right)+{\mathrm{Cl}}_2\left(\mathrm{g}\right)\rightleftharpoons 2\mathrm{NOCl}\left(\mathrm{g}\right)$, a reaction mixture containing $\mathrm{NO}\left(\mathrm{g}\right)$ and ${\mathrm{Cl}}_2\left(\mathrm{g}\right)$ at partial pressures of0.373 atm and 0.310 atm, respectively, is taken and at equilibrium the total pressure of the system is found to be 0.544 atm The value of $K_p$ for the reaction is