Practice Quiz

MCAS Chemistry Exam Practice

Category - Chemistry

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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.
Explanation
Answer: D - Attractive forces between water vapor molecules overcome molecular motion.
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