Practice Exam 3C - Practice Exam 3C Your response has been...

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Practice Exam 3C Your response has been submitted successfully.   1. Which one of the following is the primary cause of acid rain? A. N 2 B. SO 2 C. CO D. CF 2 Cl 2 E. CH 4 Points Earned: 1/1 Correct Answer: B Your Response: B 2. The average concentration of carbon monoxide pollution in air in the USA in 1995 was approximately  4.8 ppm according to the Environmental Protection Agency (EPA). What was the partial pressure of  carbon monoxide, if the atmospheric pressure was 760 torr? A. 4.8 torr B. 3.65 x 10 -3  torr C. 760 torr D. 3.65 x 10 3  torr E. 4.8 x 10 -6  torr Points Earned: 0/1 Correct Answer: B Your Response: D
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3. The following process occurs in the upper atmosphere.  N 2 (g) + h   ν  N 2 + (g) + e                  IE = 1495 kJ/mole What is the minimum frequency of a photon needed to ionize N 2 (g)? A. 3.748 x 10 15  s -1 B. 3.748 x 10 12  s -1 C. 8.01 x 10 8  s -1 D. 2.256 x 10 39  s -1 E. 2.256 x 10 36  s -1 Points Earned: 0/1 Correct Answer: A Your Response: D 4. What kind of radiation is typically absorbed by greenhouse gases? A. infrared B. UV C. microwaves D. visible light E. radiowaves Points Earned: 1/1 Correct Answer: A Your Response: A 5.
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HFC's (hydrofluorocarbons) are replacing CFC's (chlorofluorocarbons) because the C H and C bonds are stronger than C Cl bonds. If the bond enthalpy of a C F bond is 482 kJ/mol, what is the  maximum wavelength of light that is capable of breaking the C F bond? A. 307 nm B. 654 nm C. 248 nm D. 125 nm E. 953 nm Points Earned: 0/1 Correct Answer: C Your Response: B 6. Which of the following reactions is an example of a  photoionization  reaction?  A. O 2 (g) + h   ν  2O(g) B. NO(g) + h   ν  NO + (g) + e C. O 2 + (g) + 1 e -    O 2 (g) + h ν D. N 2 (g) + h   ν  2N(g) E. 2H 2 (g) + O 2 (g)   2H 2 O(g) Points Earned: 0/1 Correct Answer: B Your Response: C 7.
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