Practice Quiz

MCAS Chemistry Exam Practice

Category - Chemistry

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A leaf gently floats on a pond. Which of the following statements best explains why the leaf stays on top of the water?
  1. The leaf has nonpolar covalent bonds between its atoms.
  2. The density of the leaf is greater than the density of the water.
  3. The water molecules are held tightly together by hydrogen bonding.
  4. The hydrogen and oxygen atoms in the water are chemically bonded.
Explanation
Answer: C - The water molecules are held tightly together by hydrogen bonding.
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