A solution contains a mixture of pentane and hexane at room temperature.  The solution has a vapor pressure of 258 torr.  The vapor pressure of pure pentane is 425 torr and the vapor pressure of pure hexane is 151 torr at room temperature.  What is the mole fraction of EACH component in the mixture?

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).

53.9 grams of an unknown ionic solid with molecular formula XF are dissolved in 750 grams of water at 25 degrees C. after being fully dissolved the vapor pressure of the solution measures 23.4 torr. what is the molecular formula of the solute? The vapor pressure of water at 25 degrees C is 23.8 torr. assume every mole of XF dissociates into two moles of ions and that this solution behaves ideally.

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.

What is the composition of a methanol –propanol  solution that has a vapor pressure of 85.7 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 =

A 30.0 mL sample of this aqueous HX solution freezes at – 0.186 oC. What is the molar mass of HX?

A solution is made using 16.7 percent by mass CH2Cl2 in CHCl3. At 30 °C, the vapor. pressure of pure CH2Cl2 is 490 mm Hg, and the vapor pressure of pure CHCl3 is 260 mm Hg. The normal boiling point of CHCl3 is 61.7 °C. What is the molality of CH2Cl2 in the solution?

Menthol is a crystalline substance with a peppermint taste and odor. When 0.589 g of menthol is dissolved in 25.0 g of cyclohexane, the freezing point of the solution is lowered by 3.14 ºC. The freezing point is 6.59 and Kf constant is 20.8 for cyclohexane. Calculate the molar mass of menthol.