Solutions

An aqueous solution is prepared by dissolving 0.1‌mol of an ionic salt in 1.8‌kg of water at 35∘C . The salt remains 90% dissociated in the solution. The vapour pressure of the solution is 59.724‌mm of Hg. Vapor pressure of water at 35∘C is 60.000‌mm of Hg. The number of ions present per formula unit of the ionic salt is