The reaction below occurs in aqueous solution MnO 4 NO 2 MnO 2 NO 3 When the

The reaction below occurs in aqueous solution mno 4

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58. The reaction below occurs in aqueous solution.(A) 2(B) 4(C) 6(D) 8MnO4¯ + NO2---> MnO2+ NO3¯When the reaction is balanced, what is the coefficient of H+?59. A reaction has ΔH° = 34.3 kJ and ΔS = 15.6 J K¯1. Assuming ΔH° and ΔS° do not change appreciably with temperature, what is the minimum temperature above which the reaction will be spontaneous?60. What is the wavelength of light, in meters,that has a frequency of 1.5 x 10181?61. For which of the following molecules are resonance structures necessary to describe the bonding satisfactorily?62. Which of the following will NOT make a buffer? (Assume equal volumes of each solution.)(A) 0.10 M NaF and 0.20 M HF(B) 0.10 M HF and 0.05 M NaOH(C) 0.10 M NaF and 0.03 M HCl(D) 0.10 M NaF and 0.15 M HCl(A) 4.0 x 10¯6(B) 2.0 x 10¯5(C) 1.0 x 10¯2(D) 5.0 x 10463. If a weak acid, HA, is 1.0% dissociated in aqueous solution and the [A¯] = 2.0 x 10¯3M,what is the Kafor the acid?64. Which of the following cations is colorlessin aqueous solution?65. The solubility product of CaF2is 4.3 x 10¯11. What is the molar solubility of CaF2in a 0.050 M solution of Ca(NO3)2?66. If 12.5 g of a protein are used to prepare 1.0 L of an aqueous solution having a osmoticpressure of 4.0 torr at 20°C, what is the molar mass of the protein?67. A sample of hydrated copper (II) sulfate, CuSO4.xH2O weighs 5.29 g. When the water is driven off, the anhydrous form weighs 3.38 g. What is the value of x in the formula of the hydrated salt?(A) 2 (B) 3
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(C) 4 (D) 568. If the free energy of formation, ΔG°f, of HI(g) is 1.7 kJ mol¯1, what is the equilibrium constant, K, at 25°C, for the reactionHI(g) <===> 1/2 H2(g) + 1/2 I2(g)(A) 0.25(B) 0.50(C) 2.0(D) 4.069. Which of the following processes is accompanied by a decrease in entropy (ΔS < 0)?(C) N2(g) + O2(g) <==> 2NO(g)(D) 2 IBr(g) <==> I2(s) + Br2(l)70. Which of the following, when in the solid state has a crystal structure containing discretemolecules?1.D 21. A 41. D2.C 22. D 42. B3.A 23. B 43. D4.C 24. B 44. C5.B 25. C 45. B6.A 26. A 46. D7.D 27. D 47. B8.D 28. D 48. A9.B 29. A 49. B10. B 30. A 50. D11. B 31. A 51. C12. B 32. A 52. C13. C 33. A 53. C14. C 34. C 54. C15. C 35. C 55. D16. A 36. D 56. A17. D 37. D 57. C18. D 38. C 58. A19. C 39. D 59. D20. B 40. C 60. B
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