The vapor pressure of pure water at 25 °C is 23.8 torr. Determine the vapor pressure (torr) of water

Question

at 25 °C above a solution prepared by dissolving 35 g of urea (a nonvolatile, non-electrolyte, MW =
60.0 g/mol) in 75 g of water.

im not sure about the steps for problems like these...

Answer 1

moles urea = 35 g/molar mass urea.
moles H2O = 75 g/molar mass H2O.
total moles = moles urea + moles H2O.

mole fraction H2O = moles H2O/total moles

P_soln = X_H2O*P^o_normal