PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In organic chemistry, hydrate is a compound formed by the addition of water or its elements to another molecule. ??? ???Hydrate - Wikipedia, the free encyclopedia???, Gas hydrates are crystalline solids that consist of gas molecules, usually methane, surrounded by water molecules.
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