Consider the balanced equation below. 4nh3 + 3o2 -> 2n2 + 6h2o what is the mole ratio of nh3 to n2? 2: 4 4: 2 4: 4 7: 2

The mole ratio is 4:2

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 answer is c.the valence of the atoms combine .