## Chemistry and Chemical Reactivity (9th Edition)

a) $15.2\%$ b) $3628.8\ kernels/lb$
a) Difference in mass: $0.125\ g - 0.106\ g = 0.019\ g$ Percentage of mass that was lost: $\frac{0.019}{0.125}\times100\%=15.2\%$ b) Converting pounds to kernels: $\frac{453.6\ g}{1\ lb}\times\frac{1\ kernel}{0.125\ g}=3628.8\ kernels/lb$