round to 2 sig figs

When 125. g of glycine (C2H5NO2) are dissolved in 1500.g of a certain mystery liquid X, the freezing point of the solution is 7,4C lower than the freezing point of pure X. On the other hand, when 125,g of sodium chloride are dissolved in the same mass of X, the freezing point of the solution is 17.1C lower than the freezing point of pure X. Calculate the van't Hoff factor for sadium chloride in X. Be sure your answer has a unit symbol, if necessary, and round your answer to 2 shgnificant digits