Activation Barrier and Pre Exponential Factor Questions

Practice Problems for Test Four

Homework #4 Chapter 7 and 9

  1. How many electrons are shared in a double covalent bond?
  2. 3
  3. 4
  4. 6
  5. 8
  6. When electrons are shared equally, this type of bond is known as______
  7. Non-polar covalent
  8. Polar covalent
  9. Ionic
  10. None of these
  11. Which bond is non-polar covalent?
  12. C-O
  13. F-F
  14. C-H
  15. C-S
  16. Which of the following bonds would be the most polar?
  17. C-O
  18. O-O
  19. N-O
  20. H-H
  21. According to periodic trends, which element is the most electronegative?

A. Ne

B. O

C. F

D. C

  1. An ionic bond is the attraction between
  2. Neutral atoms
  3. Neutral ions
  4. Oppositely charged ions
  5. Similarly charged ions
  6. There are ______ unpaired electrons in the Lewis symbol for iodine atom
  7. 7
  8. 8
  9. 1
  10. 3
  11. There are ______ paired electrons in the Lewis symbol for oxygen atom
  12. 6
  13. 4
  14. 1
  15. 16
  16. What is the correct Lewis-Dot structure for SO3?
  17. What is the correct Lewis-Dot structure for NCl3?
  18. What is the correct Lewis-Dot structure for SI6?
  19. What is the correct Lewis-Dot structure for BeF2?
  20. What is the molecular shape of BCl3?
  21. Trigonal planar
  22. Tetrahedral
  23. Linear
  24. T-shaped
  25. What is the molecular shape of CO2?
  26. Linear
  27. Bent
  28. Trigonal planar
  29. Tetrahedral
  30. What is the molecular shape of PCl5?
  31. Trigonal planar
  32. Bent
  33. Tetrahedral
  34. Trigonal bipyramid
  35. What is the molecular shape of CH4?
  36. Bent
  37. Linear
  38. Trigonal planar
  39. Tetrahedral
  40. A gas has a volume of 2.5L at 24°C, what is the final temperature if the volume increases to 5.2L?
  41. 273.2 K
  42. 147.1 K
  43. 303.2 K
  44. 617.8 K
  45. The initial pressure of a gas is 0.6 atm with initial volume of 1.1L, what is the final pressure if the final volume of the gas is 0.750L?
  46. 1.14 atm
  47. 0.88 atm
  48. 1.4 atm
  49. None of the above
  50. A gas of 0.04 moles occupies volume of 0.2L at 296K. What is pressure of the gas?

Gas Constant: R=0.08206 L*atm/mol*K

  1. 0.2 atm
  2. 0.4 atm
  3. 4.86 atm
  4. 2 atm
  5. A sample of gas at 150°C and 730 torr occupies a volume of 3.0L. What volume would this gas occupy at 175°C and 780 torr?
  6. 2.97 L
  7. 0.33L
  8. 3.28L
  9. None of the above
  10. If you have a 5L balloon originally at 30°C and you increase the temperature to 60°C, what is the new volume?
  11. 10.2 L
  12. 5.5 L
  13. 2.6 L
  14. 3.9 L
  15. A deep-sea diver’s tank is filled with a mixture of oxygen, nitrogen and argon. If the partial pressure of argon is 3.0atm, the partial pressure of nitrogen is 0.5atm and the partial pressure of oxygen is 0.75atm, what is the total pressure inside the tank?
  1. 4.25 atm
  2. 5 atm
  3. 2 atm
  4. 6 atm
  5. How many moles of oxygen are there in 10.0 L at 25°C and 1 atm?
  1. 1.0 mole
  2. 0.4 mole
  3. 3.5 moles
  4. None of the above
  5. What is the density of He(g) at STP (standard temperature and pressure) of 0°C and 760 torr of pressure?
  6. 0.5 g/L
  7. 0.18 g/L
  8. 1.4 g/L
  9. 0.8 g/L
  10. What is an ideal gas?
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