Question

4.6 cu. cm of methyl alcohol is dissolved in 25.2 g of water 1) calculate % by mass of methyl alcohol 2) mole fraction of methyl alcohol and water

Answer 1

1.%by mass=weight of solute/weight of solution*100
2.mole fraction of methyl alcohol=no of moles of solute/no of moles of methyl alcohol+no of moles of water
mole fraction of wayer=1- mole fraction of methyl alcohol

I hope it helps u