NYS Regents Chemistry June 21, 2002 - Eduware

More documents

Recommendations

Info

NYS Regents Chemistry June 21, 2002 1. _________ D 2. _________ G 3. _________ C 4. _________ H 5. _________ A 6. _________ H 7. _________ D 8. _________ G 9. _________ D 10. _________ G 11. _________ D 12. _________ H 13. _________ B 14. _________ F 15. _________ A 16. _________ H 17. _________ A 18. _________ F 19. _________ D 20. _________ F 21. _________ D 22. _________ J Answer Key 31. _________ B 32. _________ J 33. _________ B 34. _________ J 35. _________ A 36. _________ F 37. _________ D 38. _________ H 39. _________ A 40. _________ F 41. _________ C 42. _________ F 43. _________ B 44. _________ G 45. _________ A 46. _________ H 47. _________ C 48. _________ F 49. _________ B 50. _________ F 51. 23. _________ D 24. _________ G 52. 25. _________ A 26. _________ H 27. _________ B 53. 28. _________ G 29. _________ C 30. _________ H
NYS Regents Chemistry June 21, 2002 Answer Key 54. a. Examples: -Test with an indicator. -Use Ph paper. -Check for creativity. b. Examples: -The base will turn phenolphthalein pink; the acid will not. -The acid will turn blue litmus paper red, and the base will turn red litmus paper blue. -Bromthymol blue will turn yellow in the acid and blue in the base. -The acid will react with an active metal like magnesium; the base will not. -The acid will have a pH less than 7; the base will have a pH greater than 7. 55. a. Endothermic b. Examples: -PE of product C is greater than PE of reactants A and B. -Product C absorbed energy and is at a higher PE than reactants A and B. 56. b Examples: – Energy flows from the injured leg to the cold pack. – Heat flows from the higher temperature (the leg) to the lower temperature (the cold pack). – The cold pack absorbs heat energy from the injured leg. c – The energy released from the hot pack is equal to the energy absorbed by the surroundings. – The total energy of the system (the hot pack) is equal to the total energy of the surroundings. – Everything else is constant. 63. 57. a. The number of moles of N 2 (g) increases or more N 2 (g) is made. b. The number of moles of H 2 (g) decreases, less H 2 (g) is made, or more H 2 (g) is consumed. c. There is no effect on the production of NH 3 (g) or that the number of moles remains the same. 64. b The electonegativity of nitrogen is 3.0 ()0.2). c Example: -Atomic number increases—electronegativity increases. and 65. Acceptable responses include, but are not limited to, these examples: -A catalyst increases the rate of both the forward and the reverse reactions equally. -The equilibrium point is reached faster. -A catalyst does not affect the concentrations of reactants or products. 58. protons and neutrons 59. Protons are positively charged (+) and neutrons have no charge (0). 60. positive or (+) 66. 61. a covalent or molecular or nonpolar covalent b Examples: -The intermolecular attractions between the particles of the solid are weak. -Weak intermolecular attractions. c Example: -There are no freely moving charged particles 62. a exothermic 67. Zn (not Zn 2+ ) loses electrons and Cr 3+ (not Cr) gains electrons. 68. 6e – + 2 Cr 3+ → 2 Cr or reduction or chromium half-reaction or Cr 3+ 3+ + 3e – → Cr.
Page 1 and 2: 1. What is the electron configurati
Page 3 and 4: 35. Given the equilibrium reaction
Page 5 and 6: 54. A student is given two beakers,
Page 7: 66. Balance the equation using the
Page 11 and 12: Category Print 1: I. ATOMIC STRUCTU
Page 13: NYS Regents Chemistry Name ________

NYS Regents Chemistry June 21, 2002 - Eduware

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?