I just gave Michael a copy of the quiz you are going to have tomorrow. He has my permission to work through it with you at SI tonight. Looking for 25's across the board tomorrow. -- Andrew J. Pounds, Ph.D. (pounds_aj at mercer.edu) Professor of Chemistry and Computer Science Mercer University, Macon, GA 31207 (478) 301-5627 http://faculty.mercer.edu/pounds_aj