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hydrate
(redirected from hydrated)

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hydrate

Chemical compound that has discrete water molecules combined with it. The water is known as water of crystallization and the number of water molecules associated with one molecule of the compound is denoted in both its name and chemical formula: for example, CuSO4.5H2O is copper(II) sulphate pentahydrate.

Even compounds that are normally gaseous can form solid hydrates under certain conditions. For example, there are large amounts of methane (natural gas) stored at the bottom of the oceans in the form of solid methane hydrate.
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Given that age, they could deduce the environmental conditions from the thickness of the hydrated layer on the obsidian, Anovitz notes.
Obsidian artifacts can record ancient climate by Perkins, S. / Science News
``We encourage all to stay hydrated in the heat, particularly the elderly and the very young.
RESIDENTS TOUGH OUT SCORCHING HEAT ELECTRICITY USAGE SOARS; OUTAGES ... by Daily News (Los Angeles, CA)
Once initially hydrated, UltraPlus 5000 will remain moist for up to 5 days without rehydration--an improvement over laminated and other skinned-surface products.
Self-contained nasal pack by Ear, Nose and Throat Journal
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