A photographic "stop bath" contains 140 mL of pure acetic acid in a 500 ml bottle of solution. What is the serverauge by volume concentration of acetic acid? (28.0 %v/v)

Answer is in the photo. I can only upload it to a file hosting service. link below!

cutt.ly/zxt1ipy

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

the awnser is group 12