character: Ms. Johnson
topic: Basic Concepts of Chemical Reactions
grade: 9
subject: Chemistry
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character: Mr. Thompson
topic: Introduction to Acids and Bases
grade: 9
subject: Chemistry
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character: Ms. Lee
topic: Balancing Chemical Equations
grade: 9
subject: Chemistry
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character: Mr. Patel
topic: Types of Chemical Reactions
grade: 9
subject: Chemistry
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