For a certain chemical process, $2.18 \times 10^{-18} \frac{\mathrm{J}}{\text { electron }} .$ What is the equilibrium constant $K_{\mathrm{eq}}$ for this reaction? (Note: $\left.\mathrm{R}=8.314 \frac{\mathrm{J}}{\mathrm{mol}=\mathrm{K}}\right)$

A. $K_{\mathrm{eq}}=1.0$

B. $K_{\mathrm{eq}}=7.4$

C. $K_{\mathrm{eq}}=8.9$

D. $K_{\mathrm{eq}}=10$