character: Mr. Smith
topic: Types of Chemical Reactions
grade: 9
subject: Chemistry
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character: Mr. Johnson
topic: Balancing Chemical Equations
grade: 9
subject: Chemistry
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character: Ms. Davis
topic: Acid-Base Reactions
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Oxidation-Reduction Reactions
grade: 9
subject: Chemistry
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