Classroom Experience Using Estimated Answers in Solving Chemistry Problems Michael E. Green Chemistry Department, The City College of the City University of New York, New York, NY 10031 Denise A. Garland Bridge to Medicine Program, The City College of the City University of New York, New York, NY 10031 Too often. introductorv chemistrv teachers find themselves facedwith atoms h e size of pl"anets. It is 'ust as easy to multiply by 6 x loz3 a s to divide by 6 x lo2'3 , and some students don't notice t h e difference of a factor of about lo4'. Reaetions that eo to completion with K,,
