hey, can someone also tell me if we have to buy the study guides for chem. (and physics i think)? like, i searced the bookstore website...they had "chemistry 3rd edition by silberberg"...and they also had "CHEMISTRY 3E STUDY GUIDE" by silberberg also- so yeah, is it any good?
also, that silberberg book has different packages to it...i.e one come with a "webcard", another with a "cyber cd-rom", and another with a "grade summit"...so is anyone of these extra's usefull...coz these packages seem to b at different prices. :S