Timberlake LecturePLUS1 Chapter 9 Empirical Formulas.
Molar Mass and Mole Calculation Problems. Molar Mass You need to calculate molar mass if you have more than one atom in a problem. It’s easy… just add.
Chapter 7 Chemical Quantities The Mole Atomic Mass and Formula Mass Copyright © 2008 by Pearson Education, Inc. Publishing as Benjamin Cummings.
Chemistry 103 Lecture 13. Outline I. The MOLE continued…. II. Determining Chemical Formulas Percent Composition (review) Empirical/Molecular Formulas.
Why is Knowledge of Composition Important? Because everything in nature is either chemically or physically combined with other substances it is necessary.
Chemistry 10.3 “Percent Composition and Chemical Formulas”
Chemical Composition Moles! Moles! Moles!. Little Problem I have a sample of CO 2 that contains 3 moles oxygen, how many grams of carbon do I have? A.