character: Mrs. Sarah Lee
topic: Introduction to Chemical Reactions
grade: 9
subject: Chemistry
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character: Mr. John Smith
topic: Balancing Chemical Equations
grade: 9
subject: Chemistry
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character: Dr. Emily Carter
topic: Types of Chemical Reactions
grade: 9
subject: Chemistry
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character: Ms. Rachel Adams
topic: Energy Changes in Reactions
grade: 9
subject: Chemistry
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