You have a stock solution of 14.8 m nh3. how many milliliters of this solution should you dilute to make 100.0 ml of 0.250 m nh3?

the correct answer would be d. hope this !

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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~ trueboss72