I need help with a problem. I am supposed to find the molar mass of an unkown substance and I have no idea what I have to do. The answer I came up with was 303.03 grams.
Here's the problem:
"At a certain temperature the vapor pressure of pure benzene(C6H6) is .930 atm. A solution was prepared by dissolving 10.0g of a non dissociating, nonvolatile solute in 78.11 g of benzene (This happens to be the molar mass of benzene). The vapor pressure of the solution was found to be .900 atm. Assuming the solution behaves ideally, determine the molar mass of the solute."
So I set up:
.900 atm/.968 atm = 1 mole Benzene/ (1 mole benzene + nsolute)
How do I solve for nsolute?
Should the pressures be in torr?
Thanks