A student made a solution by dissolving 0.144g of an unknown in 10.00g of benzene, C6H6, and found the vapor pressure solution to be 94.35mm Hg. The vapor pressure of pure benzene is 95.00mm Hg at the temperature of the experiment. (Show your work and use the factor labor method)

a. what is the mole fraction of benzene in the solution?

b. how many moles of benzene were in the solution?

c. how many moles of unknown were in the solution?

d. calculate the molar mass of the unknown.