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 is an American sports entertainment group on YouTube which 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. They have broken several Guinness World Records and have over 4.6 billion total views and 26.8 million subscribers as of February 2018, making them the 10th most subscribed channel and the most subscribed sports channel on YouTube. Their channel