Final Exam Name: Date: 1. Different arrangements of atoms are shown in the figures below. 3. Which figure represents a mixture? A. Figure 1 B. Figure 2 C. Figure 3 D. Figure 4 2. The following equations represent chemical reactions. Which equation shows that the total mass during a chemical reaction stays the same? A. 1 B. 2 C. 3 D. 4 The above picture shows a light bulb connected to a battery with the circuit interrupted by a solution. When dissolved in the water to form a 1.0 molar complete a circuit allowing the bulb to light except A. hydrochloric acid. B. sodium nitrate. C. sucrose. D. ammonium sulfate. 4. H2O2, hydrogen peroxide, naturally breaks down into H2O and O2 over time. MnO2, manganese dioxide, can be used to lower the energy of activation needed for this reaction to take place and, thus, increase the rate of reaction. What type of substance is MnO2? A. a catalyst B. an enhancer C. an inhibitor D. a reactant page 1
21. Fluorine gas is produced according to the following reaction. 2BrF5(g) (+ Br2(g) + 5F2(g) Under which of the following conditions will maximum production of fluorine gas occur? A. The temperature is reduced until the BrF condenses. B. The reaction takes place in the presence of bromine gas. C. Additional fluorine gas is continuously pumped into the container. D. Fluorine gas is removed from the system as it is formed. 22. The figure below represents a reaction. What type of reaction is shown? A. synthesis B. decomposition C. single displacement D. double displacement 23. The equation below shows the formation of nitrogen monoxide. N2 + O2 + energy ! 2NO The graph below shows how potential energy changes as nitrogen and oxygen react to form nitrogen monoxide. Which of the following conclusions about the reaction is supported by this graph? A. It is an exothermic reaction. B. It is an endothermic reaction. C. It is a decomposition reaction. D. It is a single displacement reaction. page 6 Final Exam
Problem-Attic format version 4.4.220 c_ 2011–2014 EducAide Software Licensed for use by Steve Reed Terms of Use at www.problem-attic.com Final Exam 05/20/2015 1. Answer: C 2. Answer: C 3. Answer: C 4. Answer: A 5. Answer: A 6. Answer: D 7. Answer: C 8. Answer: D 9. Answer: B 10. Answer: C 11. Answer: C 12. Answer: B 13. Answer: 14. Answer: C 15. Answer: D 16. Answer: A 17. Answer: B 18. Answer: C 19. Answer: D 20. Answer: C 21. Answer: D 22. Answer: A 23. Answer: B 24. Answer: D 25. Answer: B 26. Answer: C 27. Answer: A 28. Answer: C 29. Answer: C 30. Answer: B 31. Answer: B 32. Answer: D 33. Answer: C 34. Answer: A 35. Answer: C 36. Answer: D 37. Answer: A 38. Answer: B 39. Answer: B 40. Answer: D
Teacher’s Key Page 2 41. Answer: A 42. Answer: D 43. Answer: C 44. Answer: B 45. Answer: B 46. Answer: C 47. Answer: B 48. Answer: C 49. Answer: B 50. Answer: C 51. Answer: C 52. Answer: A 53. Answer: D Answer: B Answer: D Answer: C Answer: B 58. Answer: A 59. Answer: D 60. Answer: D 61. Answer: D 62. Answer: C 63. Answer: C 64. Answer: C Answer: D 66. Answer: C 67. Answer: B 68. Answer: B 69. Answer: B 70. Answer: D 71. Answer: C 72. Answer: D 73. Answer: A 74. Answer: D 75. Answer: D 76. Answer: D 77. Answer: C 78. Answer: D 79. Answer: B 80. Answer: A