出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/05/19 10:34 UTC 版)
A tetrahydrate is a molecule surrounded by four (4) molecules of water, forming a hydrate. The notation for a tetrahydrate is anhydrous molecule's formula·4H2O, where the 4 represents tetrahydrate, and the H2O represents the tetrahydrate. And the molecule's name changes to anhydrous molecule's name tetrahydrate.