8. Regarding the reaction, Br2O5(s) + 5 CO(g) Br2(s) + 5 CO2(g), which of the following statements is/are true? (1) Br2O5is the oxidizing agent (2) Br2is oxidized (3) CO is oxidized (4) Br2O5is reduced (A) 1 & 2 (B) 1 & 3 & 4 (C) 1 & 4 (D) All four statements 9. How many grams of KBr are contained in 300 mL of 0.85 M KBr? 10. Which of the following solutions has the highest total concentration of ions? 11. What is the Molarity of KCl in a solution prepared by adding 400 mL of water to 160 mL of 0.80 M KCl? 12. What is the Molarity of Glucose in a solution prepared by mixing 200 mL of 0.6 M glucose, 500 mL of 0.4 M glucose and 600 mL of water. (A) 0.18 M (B) 0.57 M (C) 0.25 M (D) 0.34 M 13. 140 mL of 0.20 M H3PO4(aq) is needed to completely neutralize 50 mL of an aqueous KOH(aq) solution? What is the Molarity of the KOH(aq) solution? 14. You are given 28. grams of an unknown base, X(OH)2, which is completely neutralized by reaction with 460 mL of 0.70 M HNO3. The Molar Mass of the base is approximately: 15. For which of the following processes is the work positive (i.e. w > 0)(1) The vaporization of liquid benzene [C6H6(l) C6H6(g) ] (2) The reaction, Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g) (3) Heat gas at constant volume (4) The reaction, 2 H2(g) + O2(g) 2 H2O(l) (5) Cool gas at constant pressure 16. When a 180 g sample of butane gas, C4H10(g) is cooled from 150 oC to 100 oC, 8.2 kJ (kilojoules) of heat is given off. Approximately what is the constant volume molar heat capacity of C4H10(g)? (A) 164 J/mol-oC (B) 509 J/mol-oC (C) 0.91 J/mol-oC (D) 53 J/mol-oC
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