character: Mr. John Blue
topic: Chemical Reactions and Energy Changes
grade: 9
subject: Chemistry
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character: Mr. John Blue
topic: Types of Chemical Reactions
grade: 9
subject: Chemistry
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character: Mr. John Blue
topic: Thermodynamics in Chemistry
grade: 9
subject: Chemistry
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character: Mr. John Blue
topic: Energy Changes in Exothermic and Endothermic Reactions
grade: 9
subject: Chemistry
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