character: Mr. Johnson
topic: Homogeneous and Heterogeneous Mixtures
grade: 9
subject: Chemistry
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character: Mr. Johnson
topic: Classification of Matter
grade: 9
subject: Chemistry
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character: Mr. Johnson
topic: Physical Properties of Mixtures
grade: 9
subject: Chemistry
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character: Mr. Johnson
topic: Separation Techniques in Mixtures
grade: 9
subject: Chemistry
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