At a certain temperature, the vapor pressure of pure benzene (C6H6) is 0.930 atm. A solution was prepared by dissolving 10.0 g of a nondissociating, nonvolatile solute in 78.11 g of benzene at that temperature. The vapor pressure orthe solution was round to be 0.900 atm. Assuming thc solution behaves ideally, determine the molar mass of the solute.