What is the mole fraction of the solute in 2.5 m aqueous solution? Share with your friends Share 0 Vartika Jain answered this Dear Student, Molality=MolesMass of solvent ( in kg)2.5 molal solution means 2.5 moles in 1kg of solvent which is water here. So, mass of water= 1kg =1000 gMoles of water=MassMolar mass=100018=55.55 molMoles of solute=2.5Mole fraction =Moles of soluteMoles of solute+Moles of solvent =2.52.5+55.55 =0.043 1 View Full Answer