Urea, (NH2)2CO, which is widely used in fertilizers and plastics, is quite soluble in water. If you dissolve 7.17 g of urea in 16.1 mL of water, what is the vapor pressure of the solution at 24 °C? Assume the density of water is 1.00 g/mL.

4. It is found that 0.220 g of a certain polymer dissolved in enough water to make 300 mL of solution has an osmotic pressure of 0.745 torr at 20 °C. Determine the molecular mass of the polymer.

Urea (molar mass: 60.056 g/mol) is a non-volatile solute with a solubility of 17.0 g per 100 mL of methanol at 20 ºC. The vapor pressure of pure methanol (molar mass: 32.042 g/mol; density: 0.792 g/mL) at 20 ºC is 95.7 torr. What is the vapor pressure of a saturated solution of urea in methanol at 20 ºC? Select one: a.5.00 torr b.9.83 torr c.85.9 torr d.55.6 torr

The vapor pressure of benzene, C6H6 is 100.0 torr at 26.1 °C. How many moles of a nonvolatile solute must be added to 100.0 mL of benzene to decrease its vapor pressure by 10.0% at that temperature? The density of benzene is 0.8765 g/mL.

The vapor pressure of diethyl ether (ether) is 463.57 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in diethyl ether is aspirin.Calculate the vapor pressure of the solution at 25 °C when 10.17 grams of aspirin, C9H8O4 (180.1 g/mol), are dissolved in 151.7 grams of diethyl ether.diethyl ether = CH3CH2OCH2CH3 = 74.12 g/mol.           The vapor pressure of diethyl ether (ether) is 463.57 mm Hg at 25°C.How many grams of estrogen (estradiol), C18H24O2, a nonvolatile, nonelectrolyte (MW = 272.4 g/mol), must be added to 192.1 grams of diethyl ether to reduce the vapor pressure to 452.63 mm Hg ?diethyl ether = CH3CH2OCH2CH3 = 74.12 g/mol.

At room temperature and an oxygen pressure of 1 atm, the solubility of oxygen in water is 1.35 x 10-3 mol/L. Calculate the concentration of dissolved oxygen in water under atmospheric conditions if the partial pressure of oxygen is 0.25 atm.

7. What is the vapor pressure water above a solution of 0.77 m of urea (CO(NH2)2) at 25.0 °°C? The vapor pressure of pure water at 25.0 °C is 23.8 mmHg.

It says the answer should be 22.98 torr but I have no clue how to reach the answer. Any hints are great. Thanks!