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20 Chemistry: Matter and Change * Chapter 9 Name Date Class Cag STUDY GUIDE Chemical Reactions Section 9.1 Reactions and Equations In your textbook, read about evidence of chemical reactions. For each statement, write yes if evidence of a chemical reaction is present. Write no if there is no evidence of a chemical reaction. —YES 1. A tomato smells rotten. ___NO____2. A drinking glass breaks into smaller pieces. __ NOs. A piece of ice melts. — YES _____ 4, Drain cleaner is mixed with water and the solution becomes warm. yes 5. Candle wax burns. Ves [NO 6. Molten candle wax solidifies. —\E5____7. Green leaves turn yellow and red as the seasons change. yes 8. Baking powder produces a gas that makes a cake rise. In your textbook, read about how to represent chemical reactions and how to balance chemical equations. Use the terms below to complete the passage. Each term may be used once, more than once, or not at all. arrow plus sign (s) 0) reactant product (9) (aq) ‘The fuel for the space shuttle is hydrogen, which burns in oxygen to produce water vapor and energy. In this chemical reaction, hydrogen is a(n) (9) I@Gcfan{ ___, oxygen is.acn) (10)_Feactont and water vapor is a(n) (11)__produc in a chemical equation for this reaction, a(n) (12) _GiyOW __ is used to separate hydrogen and oxygen from water vapor and energy. A(n) (13) plus sign __is used to separate the symbols for hydrogen and oxygen. A(n) (14)__(q) symbol is used to tell the state of hydrogen in the reaction, a(n) (15) ___(q) —_ symbol is used for the state of oxygen, and a(n) (16) Sep symbol is used for the state of water vapor. Study Guide Copyright © Glencoe/McGraw-Hil, a division of The McGraw-Hill Companies, ne. es iieiinanenibidiai 
