plerrius

Well, nRT has to be constant in Boyle's Law. What I quoted in the first post was the exact question. n obviously didn't change because nothing else was added, R isn't going to change because the units remained the same, and no temperature change was mentioned therefore I should assume it's constant. As for the second question, I'd imagine one should generally assume them unless stated otherwise of if it is implied by the problem.

I ended up using Boyle's Law. Tried it with v1p1=v2p2 and the answer looks correct as everything remains true after checking. I'd spent so much time thinking it would be with the ideal gas law that it kind of threw me off, I guess. Sometimes you just overlook the simplest things.

There are two flasks connected by a stopcock. One flask is 2.00 L and is filled with H2 gas at 360 torr. The other is 1.00 L and contains n2 gas at an unknown pressure. When the stopcock is released, the final pressure, at 3.00 L, is 320 torr. How would I go about to find the unknown pressure of N2? I know it's rather simple, but I cannot for the life of me figure this out, no matter how much I read my old notes or my book (Zumdahl/Zumdahl). EDIT: So I tried some different problems and I think I've finally found the solution. I got 240 torr as my answer and am fairly sure it's correct.