chem

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Formal charge: kind of confused?
why cant i get -1?

tinypic
. com
/view.php?pic=14buuti&s=7

ok in class we did this.
and for O FC= 6-4-3=+1
but S FC = -1 (I get 6-4-1= +1) which is wrong. what am i doing wrong?

i solve by doing: group # - total (bonds and lone pairs(each = 1)) - lone pairs (each pair = 1)

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