A 171 x 10 2 sec B 100 x 10 3 sec C 286 x 10 3 sec D 412 x 10 3 sec 67 A

# A 171 x 10 2 sec b 100 x 10 3 sec c 286 x 10 3 sec d

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(A) 1.71 x 102sec (B) 1.00 x 103sec (C) 2.86 x 103sec (D) 4.12 x 103sec 67. A proposed mechanism for the reaction 2 NO(g) + Br2(g) ---> 2 NOBr(g) is as follows: NO(g) + Br2(g) ----> NOBr2(g) slow NO(g) + NOBr2(g) ----> 2NOBr(g) fast The rate law is:
(A) rate = k[NO][Br2] (B) rate = k[NO]2[Br2] (C) rate = k[NO][NOBr2] (D) rate = k[NO]268. At 100 °C, nitrogen dioxide decomposes according to the following equation NO2(g) -------> NO(g) + 1/2 O2(g) The reaction is studied by following the change of the NO2concentration with time. The following three graphs were obtained. Which of the following statements is false? 69. The rate of an elementary reaction A(g) + B(g) -------> C(g) + D(g) has been studied as a function of temperature between 5000 and 18000 K. The following data were obtained for the rate constant: T (K) k (M/sec) 5000 5.49 x 10610000 9.86 x 10815000 5.57 x 10918000 9.92 x 109Calculate the activation energy for the reaction.
70. Proteins are a class of poly molecules called polypeptides, a simple example of which is represented by the structural formula The substances that serve as repeating units (monomers) in these polymers are classified as Return to 1987 National Test # 1. A 21. C 41. C 61. A 2. B 22. D 42. B 62. D 3. B 23. A 43. D 63. C 4. A 24. B 44. A 64. C 5. C 25. C 45. C 65. C 6. C 26. C 46. B 66. A 7. B 27. D 47. A 67. A 8. A 28. B 48. C 68. A 9. A 29. C 49. D 69. D 10. A 30. A 50. C 70. C 11. D 31. D 51. B
12. C 32. B 52. C 13. C 33. B 53. A 14. A 34. A 54. C 15. A 35. B 55. C 16. C 36. B 56. C 17. B 37. C 57. B 18. B 38. B 58. A 19. A 39. D 59. D 20. B 40. B 60. C

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• Spring '08
• rogers
• Atom, Reaction, Vapor pressure, uranium oxide, atomic weight, (aq)

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