How many moles urea? That's moles = g/molar mass.
moles urea = 5.00/molar mass urea = ?
moles H2O = 1000 g/molar mass H2O = ?
Total mols = mols urea + moles water = ?
moled fraction water XH2O = ?
Psolution = XH2O*PoH2O
Substitute and solve. Post your work if you get stuck.
A solution contains 5.00 g of urea, CO(NH2)2 (a nonvolatile solute) and 0.100 kg of water. If the vapor
pressure of pure water at 25 °C is 23.7 torr, what is the vapor pressure of the solution assuming ideal
behavior?
2 answers
oops. Left out a step.
To get XH2O it is mols H2O/total moles = ?
To get XH2O it is mols H2O/total moles = ?