character: Mr. Johnson
topic: Stoichiometry in Environmental Reactions
grade: 11
subject: Chemistry
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character: Ms. Smith
topic: Chemical Equilibrium in Ecosystems
grade: 11
subject: Chemistry
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character: Dr. Lee
topic: Reaction Rates and Environmental Impact
grade: 11
subject: Chemistry
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character: Mr. Thompson
topic: The Role of Catalysts in Pollution Control
grade: 11
subject: Chemistry
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