Answer:
The mol fraction of water in this solution is 0.9319
Step-by-step explanation:
Step 1: Data given
Mass of urea = 36.5 grams
Volume water = 150.0 mL
Density of water = 1.00 g/mL
Step 2: Calculate mass of water
Mass water = density * volume
Mass water = 1.00 g/mL * 150.0 mL
Mass water = 150.0 grams
Step 3: Calculate moles of water
Moles H2O = mass H2O/molar mass H2O
Moles H2O = 150.0 grams / 18.02 g/mol
Moles H2O = 8.324 moles
Step 4: Calculate moles urea
moles urea = mass urea / molar mass urea
Moles urea = 36.5 grams / 60.06 g/mol
Moles urea = 0.608 moles
Step 5: Calculate total moles
Total moles = 8.324 moles + 0.608 moles
Total moles = 8.932 moles
Step 6: Calculate mol fraction
Mol fraction of water = moles H2O / total moles
Mol fraction H2O = 8.324 moles/ 8.932 moles
Mol fraction H2O = 0.9319
The mol fraction of water in this solution is 0.9319