posted by mark .
An aqueous solution of ethanol is 3.05 M in ethanol, CH3CH2OH. Calculate the mole fraction of ethanol if the density of the solution is 0.964 g mL-1.
The basic defintion of mole fraction is the fraction of molecules of solute divided by total molecules.
molecules solute (assume 1 liter solution)= avag#*3.05
molecules water=masswater/molmasswater * avag#
mole fraction= moleculessolute/totalmolecules * 100