Which equation shows the overall reaction in a hydrogen-oxygen fuel cell?
- A$2\text{H}_2 + \text{O}_2 \rightarrow 2\text{H}_2\text{O}$
- B$2\text{H}_2\text{O} \rightarrow 2\text{H}_2 + \text{O}_2$
- C$\text{H}_2 + \text{O}_2 \rightarrow \text{H}_2\text{O}_2$
- D$\text{H}_2\text{O}_2 \rightarrow \text{H}_2 + \text{O}_2$