Practice Quiz

CLEP Chemistry Practice Test

Category - Chemistry

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When a cup of hot chocolate cools from 90°C to 80°C, which of the following is happening to the molecules of the liquid?
  1. Their rate of motion is decreasing.
  2. Their valence electrons are being lost.
  3. Their positions are becoming fixed in crystals.
  4. Their average distance from adjacent molecules is increasing.
Explanation
Answer: A - Their rate of motion is decreasing.
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