Practice Quiz

CLEP Chemistry Practice Test - Question List

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116. Two elements in a molecule have the same electronegativity values. Which of the following most likely holds the elements together and why?
  1. an ionic bond, becauseelectrons transfer from oneelement to the other
  2. a nonpolar covalent bond,because the elements shareelectrons equally
  3. a polar covalent bond, becausethe elements do not shareelectrons equally
  4. an intermolecular force, becausethe elements do not form achemical bond
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117. What is the empirical formula for C4Br2F8?
  1. CBrF
  2. C2BrF4
  3. C2BrF6
  4. C8Br8F8
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118. A crystal of table salt (NaCl) is dissolved in water. Which of the following statements explains why the dissolved salt does not recrystallize as long as the temperature and the amount of water stay constant?
  1. Na+ and Cl- ions lose their charges in the water.
  2. Water molecules surround the Na+ and Cl- ions.
  3. Na+ and Cl- ions leave the water through vaporization.
  4. Water molecules chemically react with the Na+ and Cl- ions.
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119. Which of the following equations represents the law of conservation of mass?
  1. H2O → H2 + O2
  2. 2H + 2O → 2H2O
  3. 2H2O → 2H2 + O2
  4. H2 + O2 → H2O + H2O2
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120. Which of the following statements best explains why water vapor condenses as temperature decreases?
  1. Collisions between water vapor molecules become elastic.
  2. Water vapor molecules chemically react when they collide.
  3. Water vapor molecules are pulled together by the force of gravity.
  4. Attractive forces between water vapor molecules overcome molecular motion.
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