The document provides information about writing and balancing chemical equations. It defines word equations, skeleton equations, and balanced equations. It explains that coefficients are used in balanced equations to satisfy the law of conservation of mass so that the same number and type of atoms are on both sides of the reaction arrow. It also notes that a catalyst speeds up a reaction without being used up.

1. chemistry

13. Writing Chemical Equations 11.1

18. for Conceptual Problem 11.1 Problem Solving 11.2 Solve Problem 2 with the help of an interactive guided tutorial.

28. for Conceptual Problem 11.2 Problem Solving 11.4 Solve Problem 4 with the help of an interactive guided tutorial.

33. for Conceptual Problem 11.2 Problem Solving 11.6 Solve Problem 6 with the help of an interactive guided tutorial.

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