## Chemistry: The Molecular Science (5th Edition)

$1.80\times10^{-3}\,mol\text{ aspirin}$ $2.266\times10^{-2}\,mol\,NaHCO_{3}$ $5\times10^{-3}\,mol\text{ citric acid}$
Amount of aspirin= $324\times10^{-3}\,g\text{ aspirin}\times\frac{1\,mol\,\text{aspirin}}{180.158\,g\text{ aspirin}}$ $=1.80\times10^{-3}\,mol\text{ aspirin}$ Amount of $NaHCO_{3}$= $1904\times10^{-3}\,g\,NaHCO_{3}\times\frac{1\,mol\,NaHCO_{3}}{84.007\,g\,NaHCO_{3}}$ $=2.266\times10^{-2}\,mol\,NaHCO_{3}$ Amount of citric acid= $1000\times10^{-3}\,g\text{ citric acid}\times\frac{1\,mol\,\text{citric acid}}{192.124\,g\text{ citric acid}}$ $=5\times10^{-3}\,mol\text{ citric acid}$