Which of the following compounds is least soluble in water?
1.copper (II) chloride
2.aluminum acetate
3.iron (III) hydroxide
4.potassium sulfate

a patient chooses to not take a beneficial medical treatment.

explanation:

b. accuracy of the data matters alot more than its number of digits, organization or amount of detail. quantitative observation is more accepted than the qualitative observation.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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