What is the composition of a methanol (CH3OH) – propanol (CH3CH2CH2OH) solution that has a vapor pressure of 143 torr at 40°C? At 40°C, the vapor pressures of pure methanol and pure propanol are 303 and 44.6 torr, respectively. Assume the solution is ideal. Mole fraction of methanol =  Mole fraction of propanol =

Ethylene glycol (C₂H₆O₂) is used as an additive to the water in your automobile to lower its freezing point. A solution of ethylene glycol in water has a freezing point of -8.10 °C. What is the mole fraction of ethylene glycol in this solution? (Kf for water is 1.86 °C･kg/mol).

Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 ∘C, the vapor pressure of pure benzene is 100.84 Torr. What is the vapor pressure of a solution made from dissolving 11.4 g of biphenyl in 33.4 g of benzene?

The vapor pressures of ethanol (C₂H5OH) and 1-propanol (C3H₂OH) at 35 °C are 100. mmHg and 37.6 mmHg, respectively. Assume ideal behavior and calculate the partial pressures of ethanol and 1-propanol at 35 °C over a solution of ethanol in 1-propanol, in which the mole fraction of ethanol is 0.345. Be sure each of your answer entries has the correct number of significant digits. Part 1 of 2 P ethanol Part 2 of 2 P₁- 1- propanol mmHg mmHg x x10 X S Ś

An electrolyte solution with a calculated vant hoff factor of 3 is prepared by dissolving 724.4 g of anunknown in enough water to make 4500 mL of solution. The osmotic pressure of this solution is113.34 atm at 30.0°C. What is the molecular weight of the unknown solute (R = 0.0821 L·atm/K·mol)The density of the solution is 0.80 g/cm³

A solution contains napthalene (C10H8) dissolved in hexane (C6H14) at a concentration of 10.85% napthalene by mass. Calculate the vapor pressure at 25 degrees celsius of hexane above the solution. The vapor pressure of pure hexane at 25 degrees celsius is 151 torr.

A solution is made by mixing 72.1 grams of propyl chloride, C3H7Cl, and 38.4 grams of propyl bromide, C3H7Br.  What is the vapor pressure of propyl chloride in teh solution at 25 degrees C?  Assume that the solution is an ideal solution.  The vapor pressure of pure propyl chloride is 347 torr at 25 deg C and of pure propyl bromide is 133 torr at 25 deg C.   - Thanks - need help!  I've worked this out for my quiz several times and cannot come up with the correct answer.  Heather (middle name).

The partial pressure of a solution of 175 g of CaCl2 in 975 g of water at 25 0C is torr. Given that the density of the solution is 1.10 g/mL and the partial pressure of pure water at 25 °C is 23.76 torr

Pentane (C5H12) and hexane (C6H14) form an ideal solution. At 25°C the vapor pressures of pentane and hexane are 511 and 150 torr, respectively. A solution is prepared by mixing 25 mL pentane (density, 0.63 g/mL) with 43 mL hexane (density, 0.66 g/mL).   What is the vapor pressure of the resulting solution? Ptotal=         torr   What is the composition by the mole fraction of pentane in the vapor that is in equilibrium with this solution?

A solution composed of 50.0 g strontium chloride (SrCl)) in 300 g of water at 12.0 °C. What is the mole fraction of SrCl2 in this solution? The molar mass of SrCl, is 158.5 g mol-1 and the molar mass of H2O is 18.02 g mol-1.