character: Dr. Johnson
topic: Understanding Catalysts in Chemical Reactions
grade: 9
subject: Chemistry
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character: Ms. Carter
topic: Introduction to Chemical Reactions
grade: 9
subject: Chemistry
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character: Mr. Smith
topic: The Role of Enzymes as Catalysts
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Factors Affecting Reaction Rates
grade: 9
subject: Chemistry
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