This senior chemistry lesson package discusses the Law of Definite Proportions, Percent Composition, Percentage Composition from Chemical Formula, Empirical Formula from % Composition, Molecular Formulas. Within the lesson, there are a number of practice questions (answers included in the teacher version) to keep your students engaged throughout. It is geared towards students who are in high school chemistry, either junior or senior years. The presentation contains diagrams, examples, and explan