PLEASE GUYSSS I WILL GIVE 20 4
Write a plan for them to use to carry out this investigation, so that their results
are more reliable and can be compared fairly.
Remember to include safety information.

Use a magnet to separate iron, evaporate water, i'm not sure how to separate the other two i'm sorry but good luck

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

27. =3,500,000 x 4,000 = 14,000,000,000