character: Mr. Thompson
topic: Understanding Chemical Reactions and Energy Changes
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Balancing Chemical Equations
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: The Law of Conservation of Mass
grade: 9
subject: Chemistry
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character: Mr. Patel
topic: Endothermic and Exothermic Reactions
grade: 9
subject: Chemistry
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