1. Slide 1 of 30 © Copyright Pearson Prentice Hall > The Arithmetic of Equations Using Everyday Equations A balanced chemical equation provides the same kind of quantitative information that a recipe does. 12.1

2. Slide 2 of 30 © Copyright Pearson Prentice Hall > The Arithmetic of Equations Using Everyday Equations An equation can represent the manufacturing of a single tricycle. 12.1

3. Slide 3 of 30 © Copyright Pearson Prentice Hall > The Arithmetic of Equations Using Balanced Chemical Equations Chemists use balanced chemical equations as a basis to calculate how much reactant is needed or product is formed in a reaction. The calculation of quantities in chemical reactions is a subject of chemistry called stoichiometry. 12.1

4. © Copyright Pearson Prentice Hall SAMPLE PROBLEM Slide 4 of 30 12.1

5. © Copyright Pearson Prentice Hall Practice Problems Slide 5 of 30 for Sample Problem 12.1

6. Slide 6 of 30 © Copyright Pearson Prentice Hall > The Arithmetic of Equations Interpreting Chemical Equations A balanced chemical equation can be interpreted in terms of different quantities, including numbers of atoms, molecules, or moles; mass; and volume. 12.1

7. Slide 7 of 30 © Copyright Pearson Prentice Hall > The Arithmetic of Equations Interpreting Chemical Equations 12.1

8. © Copyright Pearson Prentice Hall Slide 8 of 30 > The Arithmetic of Equations > 12.1 Mass Conservation in Chemical Reactions Mass and atoms are conserved in every chemical reaction.

9. © Copyright Pearson Prentice Hall Slide 9 of 30 Conceptual Problem 12.1

10. © Copyright Pearson Prentice Hall Practice Problems Slide 10 of 30 for Conceptual Problem 12.1 Problem Solving 12.4 Solve Problem 4 with the help of an interactive guided tutorial.