character: Mr. Johnson
topic: Types of Catalysts and Their Functions
grade: 9
subject: Chemistry
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character: Mrs. Smith
topic: Introduction to Chemical Reactions
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Enzymatic Catalysts in Biological Systems
grade: 9
subject: Chemistry
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character: Ms. Brown
topic: Homogeneous vs. Heterogeneous Catalysis
grade: 9
subject: Chemistry
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