If you need to know it, it’s in this book. Cracking the AP Chemistry, 2013 Edition includes:    • 2 full-length practice tests with detailed explanations   • Thorough subject reviews of all topics, including atomic structure, thermodynamics, the periodic table, fundamental laws, organic chemistry, molecular binding, and key equations, laws & formulas   • Helpful tables, charts, and diagrams   • Detailed advice on how to write a high-scoring essay   • Updated strategies which reflect the AP test scoring change