Does the state of matter make a difference in a substances density?

In a somewhat limited form, yes.
Gases are a lot less dense than liquids or solids, aren't they? However a liquid could be less dense than a solid (usual case) or more dense than a solid (ice floating on water -- that is an exception)

Answer    "a salt" would be the best answerexplanationsalts can be defined as ionic compounds that are neither acids nor bases. nacl is an example of a salt, and its ionic.an enzyme is an organic compound which is covalently bonded, not ionically bonded.acids are generally held together by covalent bondsan element does not need any bonds to exist