character: Ms. Johnson
topic: Energy Changes in Chemical Reactions
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Exothermic and Endothermic Reactions
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Thermodynamics in Chemical Reactions
grade: 9
subject: Chemistry
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character: Ms. Johnson
topic: Activation Energy and Reaction Rates
grade: 9
subject: Chemistry
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