Homework Help: Chemistry PLEASE HELP

Posted by lucy on Thursday, February 18, 2010 at 5:13am.

how do i calculate a concentration ratio of oxidised to reduced cytochrome c Fe2+ to Fe3+

given at 25 C and pH7
E(mV) as 100
and absorbance at 550nm as 1.5

E is relative to standard hydrogen electrode

i dont know how im supposed to calculate it from this data

please help

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