Answer
$n=1.996=2.00$
Work Step by Step
What is given...
$\mathrm{T}=298 \mathrm{~K}$
$E_{\text {Cell }}=+0.17 \mathrm{~V}$
$K=5.5 \times 10^{5}$
$n=$ ?
Formula...
$E_{\text {Cell }}=\frac{R T}{n F} \ln (K)$
$n F E=R T \ln (K)$
$n=\frac{R T}{F E} \ln (K)$
$n=\frac{(8.314)(298)}{(96485)(0.17)} \ln \left(5.5 \times 10^{5}\right)$
$n=1.996=2.00$
