H2+K2O

The chemical equation you provided involves hydrogen (H₂) and potassium oxide (K₂O). However, it is not clear what reaction you are referring to, as H₂ and K₂O can participate in various chemical processes depending on the context.

If you are looking at a specific reaction, like hydrogen reacting with potassium oxide to produce potassium and water, the equation would look something like this:

\[ \text{K}_2\text{O} + \text{2H}_2 \rightarrow 2\text{K} + \text{H}_2\text{O} \]

This shows potassium oxide decompose into potassium and water when reacted with hydrogen.

If you have a different reaction or context in mind, please provide more details!