At 20.0°C, the vapor pressure of ethanol is 45 torr and the vapor pressure of methanol is 92 torr. What is the vapor pressure at 20.0°C of a solution prepared by mixing 26.0 g of methanol and 72.0 g of ethanol?

The liquid used in automobile cooling systems is prepared by dissolving ethylene glycol (HOCH2CH2OH) in water. Ethylene glycol has a molar mass of 62.07 g/mol and a density of 1.115 g/mL at 50.0°C. Calculate the vapor pressure at 50°C of a coolant solution that is 56.0:44.0 ethylene glycol-to-water by volume. At 50.0°C, the density of water is 0.9880 g/mL, and its vapor pressure is 92 torr. The vapor pressure of ethylene glycol is less than 1 torr at 50.0°C.

The normal boiling point of methanol is 64.7°C. A solution containing a nonvolatile solute dissolved in methanol has a vapor pressure of 730.0 torr at 64.7°C. What is the mole fraction of methanol in this solution? Mole fraction of methanol

At a certain temperature the vapor pressure of pure heptane C7H16 is measured to be 178. torr. Suppose a solution is prepared by mixing 110. g of heptane and 90.9g of benzene C6H6.

A solution is prepared by adding 28.51g of lactose to 100.0g of water at 55°C. Calculate the partial pressure of water above the solution in torr. The vapor pressure of pure water at 55°C is 118.0 torr. The molar mass of lactose is 342.3 g/mol.

The vapor pressure of water at 20.0 ºC is 17.5 torr. At that temperature, what would be the vapor pressure of a solution made by dissolving 43.0 g of NaCl in 0.300 kg of water? (Assume complete dissociation of the solute and an ideal solution.)

Biphenyl, C12H10,C12⁢H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6.C6⁢H6. At 25 ∘C,25⁢ ∘C, the vapor pressure of pure benzene is 100.84 Torr. What is the vapor pressure of a solution made from dissolving 18.1 g18.1 g of biphenyl in 28.4 g28.4 g of benzene? ?solution=                                                Torr

The vapor pressure of chloroform is 173.11 mm Hg at 25 °C. A nonvolatile, nonelectrolyte that dissolves in chloroform is cholesterol.Calculate the vapor pressure of the solution at 25 °C when 13.63 grams of cholesterol, C27H46O (386.6 g/mol), are dissolved in 227.1 grams of chloroform.chloroform = CHCl3 = 119.40 g/mol.VP(solution) = ??? mm Hg

The vapor pressure of chloroform is 173.11 mm Hg at 25 C. A nonvolatile, nonelectrolyte that dissolves in chloroform is estrogen. Calculate the vapor pressure of the solution at 25 °C when 14.25 grams of estrogen, C18H2402 (272.4 g/mol), are dissolved in 219.8 grams of chloroform. chloroform = CHC13 = 119.40 g/mol. VP(solution) mm Hg

A compound contains 42.9%C,2.4%H,16.6%N, and 38.1%O by mass. The addition of 3.16 g of this compound to 75 mL of cyclohexane (density is 0.779 g/mL) gives a solution with a freezing point of 0°C. The normal freezing point of cyclohexane is 6.5°C and its freezing point depression constant is 20.2°C/m. What is the empirical mass? A. 84 g/mol B. 88 g/mol C. 36 g/mol D. 55 g/mol E. 98 g/mol F. 44 g/mol