Aspirin can be synthesized in the lab by combining salicylic acid (C7H6O3)C7⁢H6⁢O3) and acetic anhydride (C4H6O3)C4⁢H6⁢O3) to form aspirin (C9H8O4)C9⁢H8⁢O4) and acetic acid (C2H4O2).C2⁢H4⁢O2). The balanced equation for this reaction is   C7H6O3+C4H6O3⟶C9H8O4+C2H4O2C7⁢H6⁢O3+C4⁢H6⁢O3⟶C9⁢H8⁢O4+C2⁢H4⁢O2   A student started with 3.37 mL3.37 mL acetic anhydride (density=1.08 g/mL)(density=1.08 g/mL) and 1.94 g1.94 g salicylic acid. The student synthesized 1.91 g1.91 g of aspirin.

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".