An electrolysis cell is operated for 3000 s using a current of 1.50 a. from which 1.0 m solution will the greatest mass of metal be deposited?

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with this one i know the answer in craters one reason i looked it up and i learned about it there is my evidence

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.

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