Its not like JHU is bad in chemistry, (according to the US News ranking they are around 25) its just that Northwestern is better and they have more money. Both are good programs, I just have to choose one. As for which campus I would be on, the chem department is on the Homewood campus, so its on the better of the two (much safer and nicer looking).
Another thing, I was really hoping to end up on the east coast for grad schoo. Northwestern is the only school I applied to in the midwest. I was just hoping to get a change of environment for grad school. But if I end up going to NWern, I suppose I can always do an exotic post doc or something.