At 20 °C, the concentration of dissolved oxygen in water exposed to gaseous oxygen at a partial pressure of 101.3 kPa is 1.38 × 10–3 mol L–1. Use Henry’s law to determine the solubility of oxygen when its partial pressure is 20.7 kPa, the approximate pressure of oxygen in earth’s atmosphere.

3) Camphor (CoH160) melts at 179.8 °C, and it has a particularly large freezing point depression constant of 40.0 "C/m. When 0.186 g of an organic substance of unknown molar mass is dissolved in 22.10 g of liquid camphor, the freezing point of the mixture is found to be 176.7 C. What is the molar mass of the organic substance?

Consider a body of water in equilibrium with solid calcium sulfate, CaSo4, for which Ksp= 3.0 x 10^-5 at 25 degrees C. Calculate the solubility, in g/L, of calcium sulfate in water assuming that other reactions are negligible.  *

What is the mole fraction of acetone, C3H6O, in the vapor phase from a solution consisting of a mixture of acetone and ethyl acetate, CH3COOCH2CH3, at 30.00 °C, if the total pressure above the solution is 202.2 torr? The vapor pressures of pure acetone and NaN at 30.00 °C are 285.0 torr and 118.0 torr, respectively.

The freezing point depression constant for water is 1.86 °C/ m. At what temperature will a solution containing 111 g CaCl 2 and 200.0 g H 2O begin to freeze?

The vapor pressure of water at 30 °C is 4.24 kPa. Calculate the vapor pressure if 95.0 g of xylose, C₅H₁₀O₅(l), is added to 100.0 mL of water. The density of water at 30 °C is 0.996 g･mL⁻¹.

Given that the vapor pressure of water is 17.54 Torr at 20 °C, calculate the vapor-pressure lowering, AP, of an aqueous solution that is 2.20 m in sucrose (C₁2H₂2O11). ΔΡ = 0.669 Calculate the vapor-pressure lowering, AP, of an aqueous solution that is 2.20 m in calcium chloride. Assume 100% dissociation for electrolytes. ΔΡ = 1.999 Incorrect Torr Torr

What is the mole fraction of propanol, CH3CH2CH2OH, in the vapor phase from a solution consisting of a mixture of propanol and isopropanol, (CH3)2CHOH, at 25.00 °C, if the total pressure above the solution is 35.29 torr? The vapor pressures of pure propanol and NaN at 25.00 °C are 20.90 torr and 45.20 torr, respectively.

The colligative molality of seawater is approximately 1.10 m. Calculate the vapor pressure of sea water at 20 °C. The vapor pressure of pure water at 20 °C is 17.54 Torr.

What is the vapor pressure of benzene when .75 mol of naphthalene is mixed with 1.00 kg of benzene? The vapor pressure of benzene is 12.6 kPa at 25 degrees Celsius.