Chapter 3 Review packet 1

A c 7 h 26 o 5 b c 3 h 11 o 3 c c 6 h 22 o 6 d c 8 h

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a. C 7 H 26 O 5 b. C 3 H 11 O 3 c. C 6 H 22 O 6 d. C 8 H 30 O 4 e. C 5 H 19 O 40. Combustion analysis of 1.031 g of a compound with a formula weight of 180.27 amu and containing only carbon, hydrogen, and oxygen yielded 2.265 g CO 2 and 1.236 g H 2 O. What is the molecular formula of the compound? a. C 3 H 8 O b. C 9 H 24 O 3 c. C 10 H 28 O 2 d. C 6 H 20 O e. not enough information to determine 41. What mass (g) of magnesium nitride (Mg 3 N 2 ) can be made from the reaction of 1.22 g of magnesium with excess nitrogen? a. 1.69 b. 15.2 c. 5.07 d. 5.02 e. 3.38 42. A sample of nitrogen (9.27 g) reacts completely with magnesium, according to the equation: 3 Mg + N 2 ----> Mg 3 N 2 The mass of Mg consumed is _____ g. a. 8.04 b. 24.1 c. 16.1 d. 0.92 e. 13.9 43. What mass (g) of oxygen is required to burn 28.8 g of ammonia? Be sure to balance the reaction. NH 3 + O 2 -----> NO 2 + H 2 O a. 94.9
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b. 54.1 c. 108 d. 15.3 e. 28.8 44. What mass (g) of carbon dioxide will be produced by the complete combustion of 0.4560 g of C 5 H 19 O? a. 1.054 b. 0.02395 c. 0.004790 d. 2.108 e. 0.5270 45. Why is carbon dioxide called a greenhouse gas? a. It is needed in large quantities by plants growing in greenhouses. b. It is a major product of greenhouses. c. Lead carbonate is a common pigment used in green house paint. d. It absorbs heat energy radiated away from the surface of the earth, effectively trapping it in the atmosphere, much like the glass of a greenhouse. e. Bacterial degradation of fertilizers in a greenhouse environment produce large quantities of carbon dioxide. 46. What mass (g) of hydrogen is produced by the reaction of 4.73 g of magnesium with 1.83 g of water? Be sure to balance the reaction. Mg + H 2 O --> Mg(OH) 2 + H 2 a. 0.102 b. 0.0162 c. 0.0485 d. 0.219 e. 0.204 47. Silver nitrate and aluminum chloride react with each other by exchanging anions: AgNO 3 + AlCl 3 --> Al(NO 3 ) 3 + AgCl What mass (g) of AgCl is produced when 4.22 g of AgNo 3 react with 7.73 g of AlCl 3 . The reaction must be balanced. a. 17.6 b. 4.22 c. 24.9 d. 3.56 e. 11.9 48. If the reaction of 3.82 g of magnesium nitride with 7.73 g of water produced 3.60 g of magnesium oxide, what is the percent yield of this reaction? Balance the reaction. Mg 3 N 2 + H 2 O NH 3 + MgO a. 94.5 b. 78.8 c. 46.6 d. 49.4 e. 99.9
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49. What is the maximum mass (g) of Cu that is produced by the reaction of 30.0 g of CuO and 20.0 g of CH 4 ? 4CuO + CH 4 --> 2H 2 O + 4Cu + CO 2 a. 6.00 b. 24.0 c. 95.9 d. 318 e. 50.0 50. The combination of 75.00 g of Ca(OH) 2 and 150.00 g of Na 3 PO 4 produces 75.00 g Ca 3 (PO 4 ) 2 via the equation below. What is the percent yield? 3Ca(OH) 2 (aq) + 2Na 3 PO 4 (aq) --> Ca 3 (PO 4 ) 2 (aq) + 6NaOH(aq) a. 71.66 b. 100.0 c. 15.92 d. 52.85 e. 31.65
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Chapter 3 Review Packet AP Chemistry 1. b 2. a 3. b 4. b 5. b 6. e 7. a 8. a 9. c 10. a 11. c 12. b 13. a 14. e 15. b 16. a 17. b 18. c 19. d 20. d 21. c 22. b 23. a 24. c 25. d 26. c 27. d 28. d 29. d 30. d 31. b 32. a 33. a 34. a 35. d 36. a 37. a 38. c 39. c 40. b 41. a 42. b 43. a 44. a 45. d 46. a 47. d 48. b 49. b 50. a
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a C 7 H 26 O 5 b C 3 H 11 O 3 c C 6 H 22 O 6 d C 8 H 30 O 4...

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