A liquid-liquid solution is composed of 0.22 mole of pentane (C5H12) and 0.33 mole of hexane (C6H14). Assuming an ideal solution, what is the total vapor pressure of the solution at 25oC? (The vapor pressures of pure pentane and hexane at 25oC are 510 torrs and 150 torrs, respectively.)            (A) 160 torr                               (B) 290 torr           (C) 330 torr           (D) 140 torr

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 19.9 g of biphenyl in 25.8 g of benzene? (anwser needs to be in torr)

A chemist is studying small organic compounds for theirpotential use as an antifreeze. When 0.243 g of a compound isdissolved in 25.0 mL of water, the freezing point of the solutionis -0.201°C. (a) Calculate the molar mass of the compound (dof water 1.00 g/mL). (b) Analysis shows that the compoundis 53.31 mass % C and 11.18 mass % H, the remainder being O.Calculate the empirical and molecular formulas of the com-pound. (c) Draw a Lewis structure for a compound with this for-mula that forms H bonds and another for one that does not.

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.

Which solution has the higher boiling point?(a) 38.0 g of C₃H₈O₃ in 250. g of ethanol or 38.0 g of C₂H₆O₂ in 250. g of ethanol(b) 15 g of C₂H₆O₂ in 0.50 kg of H₂O or15 g of NaCl in 0.50 kg of H₂O

A 0.318 M NaOH3 solution has a density of 1.02 g/mL (a) How much osmotic pressure does the solution exert at 25 degrees Celcius   (b) Given that the pure water has a vapor pressure of 23.8 mm Hg, determine the vapor pressure of the solution

Pentane (C5H12) and hexane (C6H14) form ideal solution. At 25oC the vapor pressure of pentane and hexane are 511 torr and 150. torr, respectively. A solution is prepared by mixing 30.0mL pentane (density = 0.63g/mL) with 45.0mL hexane (density = 0.66 g/mL). (a) What are the mole fractions of pentane and hexane, respectively,in the solution? (b) What isthe total vapor pressure of the solution at 25oC? (c) What are the mole percent of pentane and hexane, respectively, in the vapor phase at 25oC? (Molar mass of pentane and hexane are: 72.15 g/mol and 86.17 g/mol, respectively.)