[sgrills3]

Just got a question I am having a little trouble with:
The vapor pressure of pure water at 110*C is 1070 torr. A solution of ethylene glycol and water has a vapor pressure of 1.00 atm at 110*C.  Assuming that Raoults law is obeyed, what is the mole fraction of ethyleneglycol in this solution?
I understand that this seems really easy but I ant seem to get my head around it.  I could work it out if I had the amounts of the substances but just having the pressure has confused me. 

[Yggdrasil]

First, start by writing out Raoult's law then plugging in the values that are given to you.

[bhardu]

jus write down raoults law and substitute values for initial pressure and pressure after adding ethylene glycol.. u dont need aamount of substances for this cos the question is askin only about the mole fraction.. for help...
the answer will be 0.289