I reviewed Water and Ice Module.
Water is a polar molecule. Why does ice float? Because ice is less dense than water.The density of water is 1.0 gm/cubic cm.
The density of ice Ih is 0.931 gm/cubic cm.
In liquid water each molecule is hydrogen bonded to approximately 3.4 other water molecules.
In ice each each molecule is hydrogen bonded to 4 other molecules.
When I want to drink cold water I put in a freezer a bottle of water using PET bottle .
Sometimes I forget to drink it next day expanded. It was happened for this reason!
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