Practice Quiz

SAT Chemistry - Question List

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106. Which of the following is the correct molecular formula for the ammonium ion?
  1. NH3
  2. N2-
  3. N2-
  4. NH4+
  5. NO3-
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107. The emission spectrum of an element is:
  1. The spectrum given off by a heated gas when its excited electrons release photons
  2. The spectrum observed from a cool gas, where black lines on the spectrum indicate photons used to excite electrons
  3. The spectrum given off by a cool gas when its excited electrons release photons
  4. The spectrum observed from a heated gas, where black lines on the spectrum indicate photons used to excite electrons.
  5. The range of gases emitted during a chemical reaction.
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108. A substance has a lustrous surface, conducts electricity, and displays the characteristics of malleability and ductility. This substance is a nonmetal. True or false?
  1. True
  2. False
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109. When sodium acetate, NaCH3COO, is added to water the resulting solution is basic. True or false?
  1. True
  2. False
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110. A catalyst increases the rate of a reaction by lowering the activation energy of the reaction. True or false?
  1. True
  2. False
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