Question

Why / how does hydrogen bonding help ice cubes float?

Answer 1

Answer:

The hydrogen bonds that form when water freezes into ice allow the molecules to be spaced farther apart, thus making them take more space, decreasing the overall density and making it float in the water.

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Answer 2

Water shows extensive hydrogen bonding , The intermolecular hydrogen bonding in ice gets taut during solidification thus increasing volume and decreasing density , In this way hydrogen helps ice cubes float