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Chem 110 Exam 2 (2002)

Chem 110 Exam 2 (2002) - PENN STATE ALTOONA CAMPUS Chem 12...

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PENN STATE ALTOONA CAMPUS Chem 12: Chemical Principles Fall 2002 Exam 2.1 Friday Oct. 25, 2002 1.) (20) Answer the following questions for the given equation; a.) What is the oxidation number of Mn in MnO 4 - ? b.) What is the oxidation number of Mn in MnO 2 ? c.) What is the oxidation number of Cl in ClO - ? d.) What is the oxidation number of Cl in ClO 4 - ? e.) What is the oxidation half-reaction? f.) What is the reduction half-reaction? g.) What is the oxidizing reactant? h.) What is the reducing reactant? i.) Balance the equation. MnO 4 - + ClO - => MnO 2 + ClO 4 - (basic) 2.) (5) Give an example of a balanced chemical equation between an ionic salt and an acid which produces carbon dioxide as one of its products. 3.) (5) What is the mass in grams of a chlorine atom? 4.) (5) A sample of a gas from a neon sign contains 0.856 mol neon, Ne, and 0.0254 mol krypton, Kr. What are the mass percentages of neon and krypton? 5.) (5) Epsom salts, a strong laxative used in veterinary medicine, is a hydrate, which means that a certain number of water molecules are included in the solid structure.
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