Practice Quiz

AP Chemistry Exam Prep - Question List

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16. What type of radioactive emission does not have mass?
  1. Beta emission
  2. Alpha emission
  3. Positron emission
  4. Gamma emission
  5. All types of radioactive emission have mass
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17. The concentration of H+ in a solution is 1x10-12. What is the pOH of the solution?
  1. 2
  2. 3
  3. 6
  4. 12
  5. 14
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18. What element has isotopes known as deuterium and tritium?
  1. Bromine
  2. Helium
  3. Oxygen
  4. Hydrogen
  5. Chlorine
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19. What is the primary purpose of adding a buffer to a solution?
  1. Reduce the pH of the solution
  2. Raise the pH of the solution
  3. Dilute the solution
  4. Stabilize the pH of the solution
  5. Precipitate solid out of the solution
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20. A 40.0 gram sample of a radioactive element decays to 5.0 grams in 15 hours. What is the half-life of this element?
  1. 3 hours
  2. 2 hours
  3. 6 hours
  4. 7.5 hours
  5. 5 hours
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