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The maximum number of hydrogen bonds in a water molecule is...........

  • A.1
  • B.3
  • C.4
  • D.2

Answer: C

A water molecule can form up to four hydrogen bonds.

It has two hydrogen atoms, each able to donate a bond, and two lone pairs on the oxygen, each able to accept one. This tetrahedral capacity is why ice has an open hexagonal lattice and is less dense than liquid water.

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