Practice Quiz

CLEP Chemistry Practice Test - Question List

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96. Hydrogen peroxide decomposes according to the equation below:

2H2O2(aq) ↔ O2(g) + 2H2O(I)

Which of the following actions will slow down the rate of this reaction?
  1. adding a catalyst
  2. adding more H2O2
  3. decreasing the temperature
  4. removing O2 that is produced
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97. When a sample of potassium chloride dissolves in water, it separates into potassium ions and chloride ions. Which of the following best accounts for the positive charge of the potassium ions?
  1. They have extra mass.
  2. They have a large volume.
  3. They have fewer electrons than protons.
  4. They have a high density of neutrons and protons.
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98. Which of the following characteristics allows blood to resist changes in pH?
  1. acidity
  2. basicity
  3. buffering capacity
  4. clotting factors
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99. Which of the following statements applies to a nuclear fission reaction?
  1. The reaction has no commercial applications.
  2. The reaction takes place only at very high temperatures.
  3. The reaction produces only short-lived radioactive waste.
  4. The reaction releases large amounts of energy when nuclei split apart.
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100. A sealed flask contains 1.3 X 1025. molecules of CO2. How many moles of CO2 are in the flask?
  1. 0.046 mol
  2. 22 mol
  3. 3.0 X 1023 mol
  4. 7.8 X 1048 mol
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