Water is an oxide.
When a compound lacks water, it is called anhydrous.
Salt and water do not form a compound of any kind - neither decimal nor chemical.
The absorption of water by an anhydrous compound is called hydration. This process involves the compound forming a hydrate by combining with water molecules.
a compound
Water is a pure compound -- all of it is one kind of molecule: H2O.
The compound H2O is called water.
Sodium
The physical association of water with a compound is called hydration. Water molecules surround and interact with the ions or molecules of the compound, forming a hydrated complex.
Solution
That's called a compound.That's called a compound.That's called a compound.That's called a compound.
The chemical compound that is called CH2 is a hydrocarbon. One can learn more about this chemical compound at popular on the web sources such as Chymist.
The reaction you are referring to is called a dehydration synthesis reaction. In this reaction, two molecules combine to form a larger compound while releasing a water molecule as a byproduct.