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Ch.2 Questions - Chapter 2 Homework CHM 1311-Sibert Review...

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Chapter 2 Homework CHM 1311-Sibert Review Questions: 2.4 The formulas and names of the nonmetallic elements that exist in nature as diatomic molecules are: Hydrogen(H), Oxygen(O), Nitrogen(N), Fluorine(F), Chlorine(Cl), Bromine(Br), and Iodine (I). 2.5 The formula of the substance that remains when Epsom salts is completely dehydrated is MgSO 4. 2.6 When we say a chemical equation is balanced we mean that since atoms can not be created or destroyed in a chemical reaction, we must have the same number of atoms before and after the reaction. 2.15 Chemical energy is also known as potential energy, which is energy an object has tht can be changed to kinetic energy (stored energy). 2.19 The law of conservation of energy: Energy cannot be created or destroyed; it can only be changed from one form to another. When you toss a ball, its potential energy increases as it goes up and is changed back into kinetic energy when it falls down. These observations are consistent
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