## Chemistry and Chemical Reactivity (9th Edition)

$509.5\ g$
Molality: $\Delta T_f\rightarrow m=-10^{\circ}C\div(1.85\times-1.86^{\circ}C/m)=2.90\ m$ Number of moles: $2.90\ mol/kg\times 3.0\ kg=8.72\ mol$ Mass: $8.72\ mol\times 58.44\ g/mol=509.5\ g$