Your Safer Source for Science

Since 1977

Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax 866-452-1436

How many angels will fit on the top of a pin? Impossible to say. But with a little thought, your students can figure out how many times they would have to slice a pie to be left with one molecule of sugar!


  • Mole Concept
  • Stoichiometry
  • Molarity