## Chemistry and Chemical Reactivity (9th Edition)

Published by Cengage Learning

# Chapter 4 Stoichiometry: Quantitative Information about Chemical Reactions - Study Questions - Page 179b: 18

#### Answer

$130.44\ g$

#### Work Step by Step

Molecular weights (g/mol): Aspirin: $180.16$ Salicylic acid: $138.12$ Acetic anhydride: $102.09$ With equal masses, the limiting reactant is Salicylic acid (higher molecular weight means smaller number of moles) Number of moles of salicylic acid reacted: $100\ g\div 138.12\ g/mol=0.724\ mol$ Mass of Aspirin formed: $0.724\ mol\times 180.16=130.44\ g$

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