character: Student C
topic: Calculating Density with Formula
grade: 9
subject: Chemistry
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character: Student A
topic: Understanding Mass and Volume
grade: 9
subject: Chemistry
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character: Student B
topic: Applying Density in Real-World Situations
grade: 9
subject: Chemistry
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character: Student D
topic: Comparing Density of Different Substances
grade: 9
subject: Chemistry
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