Final exams in CHEM 2000 are always cumulative, covering all concepts taught throughout the course. 

The practice tests should be used to self-test.  Just reading them (or, worse yet, just reading the answer keys) is a waste of your time and denies you the learning opportunities available when they are used properly.  Do a practice test with your books closed and time yourself.  Only allow yourself the tools you would have on a real test (periodic table, molecular modeling kit and ruler; check with your instructor whether or not a calculator will be permitted).

Please note that electronic answer keys do not exist for Prof. Dibble's old final exams.