Please make sure the Sig Figs are 100% correct! Thank you!

When 62.2g of glycine (C2H5NO2) are dissolved in 650.g of a certain mystery liquid x, the freezing point of the solution is 7.6C lower than the freezing point of pure x. On the other hand, when 62.2g of sodium chloride are dissolved in the same mass of x, the freezing point of the solution is 15.0C lower than the freezing point of pure x. Calculate the van't Hoff factor for sodium chloride in x. Be sure your answer has a unit symbol, if necessary, and is rounded to the correct number of significant digits