When 187. g of benzamide C7H7NO are dissolved in 500. g of a certain mystery liquid X, the freezing point of the solution is 8.90C less than the freezing point of pure X.

Calculate the mass of iron(III) nitrate FeNO33 that must be dissolved in the same mass of X to produce the same depression in freezing point. The van't Hoff factor =i3.64 for iron(III) nitrate in X.

Be sure your answer has a unit symbol, if necessary, and round your answer to 3 significant digits(plss)