If the half-life of a chemical compound is 8.9 days, determine the first-order removal-rate constant (k).

Particle exchange energy though elastic collision , hope this .

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