[synthon]

Isomers of 1-butene? Or isomers of butene?

My money's on (cis)-2-butene, btw.

[Babcock_Hall]

All possible forms of butene (all butene isomers) would include 1- butene, but the unknown cannot be 1- butene.  Therefore, I would say all isomers of 1-butene are still in the running at this point.

[jadeite78]

why i have a negative mole snack??

Don't worry about that; just try writing the structures of three isomers of 1-butene, and you will at least be closer to an answer than you were before.  I agree that some information seems to have been left out of the problem; therefore, if you have any more data for us to go on, then please supply it.

Thank you babcock_Hall.  I really didn't leave any information out, that was the information supplied to me.  All I have is the height, the area under the curve, i don't know where they got 64ppmv.  But I looked it up and there is parts per million by volume, and ppbv which is parts per billion by volume.  But I will do the isomers of 1-butene.  Thanks