The most underrated topic imo. No matter how many times I practice, there will always be one question that seems out of this world.
they gave which product they want right. K2MnO4. So only that half reaction is to be considered.
You know the full reaction for decomposition so you know the other product is MnO2. If they wanted us to consider both products they would say, during decomposition of KMnO4 what is its equivalent weight.