What is oxidation states of (a) Br in `Br_(3)O_(8)` (b) C in `C_(3)O_(2)` , (c) 8 in `S_(4)O_(6)^(2-)`

Explanation

(a) structure of `Br_(3)O_(8)` is
Oxidation numbers of bromine in `Br_(3)O_(8)` are +6, +4, +6
(b) Structure of `C_(3)O_(2)` is `O = overset((+2))(C) = overset((O))(C) = overset((+2))(C) = O`
Oxidation numbers of carbons in `C_(3)O_(2)` are +2, 0, +2
(c) Structure of `S_(4)O_(6)^(2-)` is
Oxidation numbers of sulphur in `S_(4)O_(6)^(2-)` are +5, 0, 0, +5.