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Questions and Problems Q1 What evidence of a chemical reaction might you see in the following cases? Refer to Table 10.10. a. dropping an Alka-Seltzer tablet into a glass of water b. bleaching a stain c. burning a match d. rusting of an iron nail a. Q2 Balance the following equations: Mg(s) + HCl(aq) → H2(g) + MgCl2(aq) b. Al(s) + O2(g) → Al2O3(s) c. Fe2O3(s) + H2O(1) ► Fe(OH)3(s) d. Ca(OH)2(aq) + HNO3(aq) Ca(NO3)2(aq) + H2O(1) Q3 Write a balanced equation for each of the following reactions. Write the correct formulas of the reactants and products and the states of each. a. Liquid pentane (C5H12) and oxygen (O2) gas react to form carbon dioxide and water. b. Sodium and water react to form sodium hydroxide and hydrogen gas (H2). c. Iron and oxygen (O2) gas react to form iron(III) oxide. Q4 Classify each reaction as combination, decomposition,

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