character: Dr. Smith
topic: Introduction to Stoichiometry
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Basic Principles of Chemical Reactions
grade: 9
subject: Chemistry
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character: Mr. Lee
topic: Balancing Chemical Equations
grade: 9
subject: Chemistry
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character: Mrs. Patel
topic: Mole Concept and Its Applications
grade: 9
subject: Chemistry
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