A certain liquid $x$ has a normal boiling point of $102\mathrm{.}70C$ and a boiling point elevation constant $K_b=1\mathrm{.}72C*kg*mo{l}^{-1}.$ A solution is prepared by dissolving some alanine $(C_3{H}_{7}N{O}_2)$ in $250.g$ of $x.$ This solution boils at $106\mathrm{.}1C.$ Calculate the mass of $C_3{H}_{7}N{O}_2$ that was dissolved.

Be sure your answer is rounded to the correct number of significiant digits.