Practice Quiz

MTEL Chemistry Practice Exam - Question List

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21.
Which of the following symbols represents the element silver?
  1. Si
  2. Hg
  3. Sn
  4. Ag
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22.
Which of the following is one cause of eutrophication in aquatic ecosystems?
  1. An increase in the amount of acid precipitation.
  2. An increase in the concentration of heavy metals
  3. An overabundance of nitrogen-containing compounds.
  4. An overabundance of dissolved oxygen
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23.
Use the entropy equation below to answer the question that follows.
S = k × log W
In the entropy equation shown, S represents entropy, k is the Boltzmann constant, and W represents the number of ways particles can be arranged. Given this information, which of the following best describes what happens to the variables in the equation above as a compound undergoes a phase transition from solid to liquid to gas?
  1. The value of S decreases.
  2. The value of k increases.
  3. The values of S, k, and W decrease.
  4. The value of W increases.
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24.
A system undergoes an exothermic process releasing 2.5 kJ of heat. During this process, the system does 0.5 kJ of work. According to the first law of thermodynamics, what is the change in the system's internal energy?
  1. –3.0 kJ
  2. –2.0 kJ
  3. 2.0 kJ
  4. 3.0 kJ
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