character: Mr. Johnson
topic: Mole Concept and its Applications
grade: 12
subject: Chemistry
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character: Ms. Smith
topic: Stoichiometry in Chemical Reactions
grade: 12
subject: Chemistry
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character: Dr. Brown
topic: Avogadro's Law and Gas Calculations
grade: 12
subject: Chemistry
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character: Professor Green
topic: Empirical and Molecular Formulas
grade: 12
subject: Chemistry
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