$1 \,\mathrm{mol}\, \mathrm{O}^{-2}$ ion $\rightarrow 1 \times 10\, \mathrm{mol}\, \mathrm{e}^{-}=6.023 \times 10^{24} \,\mathrm{e}^{-}$
$1\, \mathrm{mol}\, \mathrm{CH}_{4} \Rightarrow 1 \times 10 \,\mathrm{mol}$ protons
$1 \,\mathrm{mol} \,\mathrm{H}_{2} \mathrm{O} \Rightarrow 1 \times 10\, \mathrm{mol}$ protons
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$(i)$ $C{H_3}\mathop {\mathop C\limits_{||} }\limits_O - {O^ - }$ $(ii)$ $C{H_3}{O^ - }$
$(iii)$ $C{N^ - }$ $(iv)$ $Image$
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