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Unformatted text preview: (Show all work.) H S O 4 & 5. (2 pts) In the following reaction, which element is being oxidized and which is being reduced? Cu(s) + 4 HNO 3 (aq) v Cu(NO 3 ) 2 (aq) + 2 H 2 O( R ) + 2 NO 2 (g) 6. (2 pts) Internal energy, E, is a state function . What does this mean? Copyright R. J. Zellmer, January 5, 2012 7. (3 pts) The standard enthalpies of formation, ) H f , at 25C for SO 2 (g) and SO 3 (g) are -296.9 kJ/mol and -395.2 kJ/mol, respectively. What is the enthalpy of reaction, ) H AND is the reaction endothermic or exothermic? 2 SO 2 (g) + O 2 (g) v 2 SO 3 (g) 8. (12 pts) Consider the following molecules and list their molecular shapes (NOT the electron domain geometries) and whether they are polar or nonpolar. Provide a short explanation for your choices. H 2 S BH 3 NF 3 CH 3 Cl 9. (1 pt) What volume (in mL) of a 5.0 M NaCl solution is needed to make 500.0 mL of a 2.0 M NaCl? Copyright R. J. Zellmer, January 5, 2012 OVER . .....
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- Winter '08