Determine the total pressure in a closed vessel containing N2, O2, and CO2, if the partial pressure of N2 is 4 atm, and the partial pressure of O2 is 6 atm, and the partial pressure of CO2 is 20atm?

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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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