The reaction in Fig.1 takes place rapidly when manganese(IV) oxide is present in the mixture. However, the manganese(IV) oxide is unchanged when the reaction has finished: it acts as a catalyst. At the end of this reaction, when all the hydrogen peroxide has broken down, the catalyst remains chemically unchanged.
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Dude Perfect. Dude Perfect is an American sports entertainment group based on YouTube, and consists of twins Coby and Cory Cotton, Garrett Hilbert, Cody Jones and Tyler Toney, who are all former high school basketball players and college roommates at Texas A&M University.