## Chemistry and Chemical Reactivity (9th Edition)

$1.79\times10^{-5}\ g$
Converting from number of ions to number of moles: $100\times10^{15} \ ions\div 6.022\times10^{23}\ ions/mol=1.66\times10^{-7} mol$ Converting from number of moles to mass: $1.66\times10^{-7} mol\times 107.8682\ g/mol=1.79\times10^{-5}\ g$