Hi, I have a question on one of my chemistry problem sets, and I have no clue how to approach this. I tried different things but they don't seem right...
The question is:
Assuming that 30 proof alcohol contains only water and ethanol, what is the partial pressure of ethanol in the headspace of the bottle? (The density of ethanol is 0.78g/mL)
I know raoults law is often used to find partial pressure: P(solvent)= X(solvent) P*(solvent)
But I'm not sure how this could be used for this question.
I was also given that the mixing ratio of ethanol is 5ppbv= 5.0 x 10-9 atm
Any help will be greatly appreciated! Thanks in advance!