Chapter 17, Problem 63QAP

Consider a voltaic cell at 25°C in which the following reaction takes place.
$3{\text{H}}_2{\text{O}}_2\left(aq\right)+6{\text{H}}^{+}\left(aq\right)+2\text{Au}\left(s\right)\to 2{\text{Au}}^{3+}\left(aq\right)+6{\text{H}}_2\text{O}$
(a) Calculate E°.
(b) Write the Nernst equation for the cell.
(c) Calculate E when $\left[{\text{Au}}^{3+}\right]=0.250M,\left[{\text{H}}^{+}\right]=1.25M,\left[{\text{H}}_2{\text{O}}_2\right]=1.50M$ .