Chemistry - Ideal Gas Question with Solution | TestHub

An open manometer attached to a flask containing ammonia gas have no difference in mercury level initially as shown in diagram. After sparking into the flask, ammonia is partially dissociated as$2{\text{NH}}_3\left(\text{g}\right)⟶{\text{N}}_2\left(\text{g}\right)+3{\text{H}}_2\left(\text{g}\right)$. Now it have difference of$\text{18}\text{cm}$in mercury level in two columns, what is partial pressure of${\text{H}}_{\text{2}}\left(\text{g}\right)$at equilibrium ?