(C) The formula for $EAN$ is: $EAN = Z - \text{oxidation state} + 2 \times \text{coordination number}$.In potassium ferricyanide,$K_3[Fe(CN)_6]$,the i

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(C) The formula for $EAN$ is: $EAN = Z - \text{oxidation state} + 2 \times \text{coordination number}$.In potassium ferricyanide,$K_3[Fe(CN)_6]$,the iron is in the $+3$ oxidation state.The atomic number $(Z)$ of $Fe$ is $26$.The coordination number is $6$.$EAN = 26 - 3 + (2 \times 6) = 23 + 12 = 35$.