character: Dr. Patel
topic: Understanding Concentration and Mixtures
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Solutions and Solubility
grade: 9
subject: Chemistry
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character: Mr. Khan
topic: Acids, Bases, and pH Levels
grade: 9
subject: Chemistry
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character: Dr. Lee
topic: Chemical Reactions and Mixtures
grade: 9
subject: Chemistry
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