A 298k the vapour pressure of water is 23.75mmhg.calculate the vapour pressure at same tempreature over 5% aqurous solution of urea?

Answer 1

I wonder if PCB is a subject.5% what? w/w, w/v? I'll assume 5% w/w.
That will make it 5 g urea + 95 g H2O.
mols urea = grams/molar mass = ?
mols H2O = grams/molar mass = ?
Total mols = the sume
XH2O = mols H2O/total mols.
psoln = XH2O*PoH2O
Post your work if you get stuck.

Answer 2

23.38 mmHg