Which of the following equations is balanced? I. 2KCI + Ca(NO3)2 → KNO3 + CaCl2
II. FeCl3 + 3KOH+ Fe(OH)3 + 3KCI
TII. 2Na + H2SO4 → Na2SO4 + H2
A) I, II and III
B I and II only
C II and III only
D I and III only

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

i think its 5049.

i hope this !