character: John Green
topic: Chemical Reactions
grade: 12
subject: Chemistry
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character: Danica McKellar
topic: Catalysis in Chemical Reactions
grade: 12
subject: Chemistry
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character: Hank Green
topic: Types of Chemical Reactions
grade: 12
subject: Chemistry
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character: Craig Benzine
topic: Enzymes as Catalysts
grade: 12
subject: Chemistry
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