Now that you have read all of the Chemistry Lecture Notes on Stoichiometry, you should now do the Stoichiometry tutorial in ChemTutor Excalibur. This will give you a chance to apply what you have just read, which is the only way to truly learn Stoichiometry. ChemTutor Excalibur provides excellent chemistry help and it will give you practice on every type of Stoichiometry problem you are likely to see on any chemistry test or exam at the high school or college level. It will also give you a detailed explanation of how to solve each of those problems. Then you should read through the Chemistry Lecture Notes on Atomic Theory.