A solution containing 30 g of non-volatile solute exactly in 90 g of water has a vapour pressure of 2.8 kPa at 298K. Further, 18g of water is then added to the solution the the new vapour pressure becomes 2.9 kPa at 298 K. calculate: the solution and the new vapour pressure becomes 2.9 kPa at 298K. calculate
(i). molar mass of the solute
(ii). Vapour pressure of water at 298K.