Question

the vapour pressure of pure water at 110 degrees is 142.7kpa. a solution of ethylene glycol and water has a vapour pressure of 101.3kpa at 110 degrees. assuming that raoults law is obeyed, what is the mole fraction of ethylene glycol in the solution?

I get confused when they don't give any values of the solute/solvent. I have tried by assuming 100ml and 1000ml of h2o but I cant get the answer required.
0.450
0.290
0.290

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