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Miraculous Water

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Water is baffling – even to scientists. From its refusal to obey the ordinary rules of liquids to its insistence on becoming lighter when it freezes, water is as curious as it is vital.

H2O, two hydrogen atoms covalently bonded to a single oxygen atom, is the chemical composition of this fascinating substance. What makes it so fascinating? Let’s look at a few facts:

Say you put two pails of water outside on a freezing day. One contains hot water  (95ºC) and the other an equal amount of warm water (50ºC). Which freezes first?

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