What is the mole fraction of ethanol, C2H5OH, in an aqueous solution that is 50.0% ethanol by mass?

Answer 1

assume 1000g
molesEthanol=500/46
molesH2O=500/18

mole fractionEthanol=moleEthanol/total moles
= (500/46)/(500/46+500/18)
= 1/(1+46/18)

Answer 2

Calculate yourself .I hope u all have got brain...Right.!!

Answer 3

0.282