thank you for solving it in advance!

When 45.9g of glycine (C2H5NO2) are dissolved in 1050.g of a certain mystery liquid X, the freezing point of the solution is 8.50 s C less than the freezing point of pure X Calculate the mass of iron(III) nitrate (FeNOO)3) that must be dissolved in the same mass of X to produce the same depression in freezing point. The vant Hoff factor (=3.72 for iron(II) nitrate in X. Be sure your answer has a unit symbol, If necessary, and is rounded to the correct number of significant digits