Which statement about the order of a reaction is true A A second order reaction

Which statement about the order of a reaction is true

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64. Which statement about the order of a reaction is true? (A) A second order reaction is also bimolecular. (B) Increasing the concentration of a reacting species increases the reaction order. (C) Reaction order can only be determined experimentally. (D) The overall reaction order can never exceed three since these reactions always occur in smaller steps. 65. Which precipitate is colored? 66. According to the Bragg Equation, 2dsin = nWhen X-rays of the same wavelength strike two crystals with the same packing but with different atom sizes, the one with smaller atoms will create a diffraction pattern is which the spacing of the points of coincidence 67. In the reaction CH3C(triple bond)CH + 2 Br2the organic product is
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68. Water is the only liquid among the compounds listed below having similar molar mass. Why? molecule molar mass state at 25 °C HF 20 g mol¯1gas H2O 18 g mol¯1liquid CH416 g mol¯1gas (A) Water possesses stronger hydrogen bonds than the other compounds. (B) Water is more polar than the others. (C) Water has the highest density of the three (D) Water has more hydrogen bonds than the others. 69. In the lanthanide elements, which orbitals are only partially filled? 70. The quantum numbers for the electron lost when Ag becomes Ag+are U.S. National Chemistry Olympiad: 1991 National Test Answersreturn to test 1. A 21. B 41. C 61. A 2. C 22. A 42. A 62. D 3. C 23. A 43. C 63. D 4. D 24. C 44. C 64. C 5. A 25. A 45. B 65. C
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6. B 26. A 46. D 66. A 7. C 27. B 47. B 67. C 8. C 28. C 48. C 68. D 9. D 29. A 49. C 69. B 10. B 30. B 50. D 70. C 11. B 31. C 51. B 12. C 32. D 52. B 13. C 33. C 53. B 14. C 34. A 54. B 15. D 35. D 55. A 16. B 36. D 56. A 17. C 37. B 57. B 18. C 38. C 58. B 19. B 39. D 59. C 20. B 40. D 60. C
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