Now, so we basically start with 100 grams of cyclohexane which freezes at six degrees Celsius. We add 2 grams of unknown compound to our beaker of 100 grams of cyclohexane and that solution freezing point drops to 2.7 degrees Celsius. Now, our goal is to use the freezing point depression formula to find the Molar mass. In the first step we write our freezing depression formula and that basically state that's the change in temperature equal there constant times molarity times I I is a bond half factor and in this case it's one. Because our unknown compound does not associate into anything, it stays the way it is. So you plug in our values and we get six -20 or 2.7 degrees Celsius.