posted by Courtney Venable .
A sample of a volatile liquid is vaporized completely in a 240 ml falsh at 99 c and 757 torr. The vapor is then allowed to condense to al liquid and its mass is determined to be .564 grams.
What is the molecular mass of the liquid (that was vaporized)?
Use PV=nRT to find moles
Then, mole mass=mass/moles