Regarding the reaction br 2 o 5 s 5 cog br 2 s 5 co 2

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8. Regarding the reaction, Br 2 O 5 (s) + 5 CO(g) Br 2 (s) + 5 CO 2 (g), which of the following statements is/are true? (1) Br 2 O 5 is the oxidizing agent (2) Br 2 is oxidized (3) CO is oxidized (4) Br 2 O 5 is 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 H 3 PO 4 (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 HNO 3 . 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 [C 6 H 6 (l) C 6 H 6 (g) ] (2) The reaction, Zn(s) + 2 HCl(aq) ZnCl 2 (aq) + H 2 (g) (3) Heat gas at constant volume (4) The reaction, 2 H 2 (g) + O 2 (g) 2 H 2 O(l) (5) Cool gas at constant pressure 16. When a 180 g sample of butane gas, C 4 H 10 (g) is cooled from 150 o C to 100 o C, 8.2 kJ (kilojoules) of heat is given off. Approximately what is the constant volume molar heat capacity of C 4 H 10 (g)? (A) 164 J/mol - o C (B) 509 J/mol - o C (C) 0.91 J/mol - o C (D) 53 J/mol - o C
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CHEM 1413.001 - Exam 2 – October 17, 2012 - Part 2 - Version A Constants and Conversion Factors Avogadro's Number: N A = 6.02x10 23 mol -1 Conversion Factors: 1 atm. = 760 torr 1 L-atm = 101 J (Joules) Molar Masses: P 4 O 10 - 284. H 3 PO 4 - 98. Al 2 (CO 3 ) 3 - 234. C 3 H 8 - 44 CO 2 - 44. C - 12. O - 16. Na 2 C 2 O 4 - 134.
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