The Wonders of Water
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Questions and Answers

What is the molecular structure of a water molecule?

  • Tetrahedral, with four hydrogen atoms bonded to an oxygen atom
  • Planar, with three hydrogen atoms bonded to an oxygen atom
  • Bent, with two hydrogen atoms bonded to an oxygen atom (correct)
  • Linear, with two oxygen atoms bonded to a hydrogen atom
  • What causes the bent shape of a water molecule?

  • Presence of tetrahedral arrangement
  • Repulsion between shared and unshared electron pairs (correct)
  • Attraction between hydrogen and oxygen atoms
  • Absence of lone pairs of electrons
  • What is the role of the oxygen atom in a water molecule?

  • Forms bonds with four hydrogen atoms and carries no unshared electrons
  • Forms bonds with two hydrogen atoms and carries two pairs of unshared electrons (correct)
  • Forms bonds with one hydrogen atom and carries three pairs of unshared electrons
  • Forms bonds with three hydrogen atoms and carries one pair of unshared electrons
  • What is the most stable arrangement for a water molecule?

    <p>Tetrahedron, with the O−HO−H, O, H, bonds forming two out of the four “legs”</p> Signup and view all the answers

    What makes water very good at supporting life?

    <p>Unusual chemical properties and common presence in organisms</p> Signup and view all the answers

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