Chemical Reactions and Quantities Chapter 7 Chemical Reactions occur Everywhere… • …when fuel burns with oxygen in our cars to make the car move… • …when we cook our food… • …when we dye our hair… • …in our bodies, chemical reactions convert food into molecules that build and move muscle… • …in leaves of trees and plants, carbon dioxide and water are converted to carbohydrates… Some chemical reactions are simple, whereas others are quite complex… • However, they can all be written by chemical equations that chemists use to describe chemical reactions. • In every chemical reaction, atoms are rearranged to give new substances. – Just like following a recipe, certain ingredients are combined (and often heated) to form something new. Chapter Seven 7.1 – Equations for Chemical Reactions 7.2 – Types of Reactions 7.3 – Oxidation-Reduction Reactions 7.4 – The Mole 7.5 – Molar Mass and Calculations 7.6 – Mole Relationships in Chemical Equations 7.7 – Mass Calculations for Reactions 7.8 – Limiting Reactants and Percent Yield 7.9 – Energy in Chemical Reactions