How many molecules of oxygen is used when 15 grams of CH4 is burned in open air? Balanced equation: CH4 + O2 -> CO2 + 2 H20
O 4.51x1023
O 5.63x1 choy
O 6.11x1023
O 8.72x1023

c (diamond),

sio2 (quartz)

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