I have a quiz on Tuesday at chemistry, and I began reviewing for it. The subject is the Ideal Gas Law. I pretty much got the hang of it, except that I have one tiny problem. I'm kind of rusty on chemistry, and that's preventing me from getting a good grip. I've looked on Wikipedia, but it seems to only further my confusion (tried the manual, doesn't cover this topic). I can't exactly remember what a mole, atomic weight (or mass) is, and all that other stuff. The ideal gas law, in the forms that I've been taught, has either n (the number of moles, where I'm a little hazy) or m/miu (mass over molar mass, or something) at which point I'm completely lost. I don't know what molecular mass is, the difference between molecular and molar mass, and I don't know where to find either on a periodic table. Also, if someone can provide a good printable periodic table with the required stuff on it (masses, where to find them, and everything) or perhaps a list with the elements and their masses, I would be grateful. PS I may not even know what I don't know, that's how much I don't remember. So if it seems that what I'm asking isn't really related to the ideal gas law or applying it, please tell me so.