Limiting reactant calculation for aspirin yield

Steps:

• Moles of 2-hydroxybenzoic acid: 10.0 g / 138 g/mol = 0.0725 mol.
• Moles of ethanoic anhydride: 10.0 g / 102 g/mol = 0.0980 mol.
• Acid is limiting (1:1 ratio, fewer moles than anhydride).
• Maximum aspirin: 0.0725 mol × 180 g/mol = 13.0 g.

Why C is correct:

• 13.0 g matches mass from limiting reactant's moles times aspirin's molar mass (stoichiometric yield formula).

Why the others are wrong:

• A: Underestimates by ignoring full conversion of limiting reactant.
• B: Assumes 1:1 mass ratio, ignores molar masses and stoichiometry.
• D: Overestimates using anhydride moles, which is in excess.

Final answer: C