In our last step, we basically plug in our values. So for molality, which we got from the first step is zero point 65 equals two divided by x. Our unknown. The molar mass entire thing divided by 0.10.1
comes from 100 grams. Remember, we want to deal with kilograms of our solid and we're given 100 grams. So divide this by 1000, we get 0.1
kg, bring this over, multiply this out, then bring it back and we at two divided by 0.165 equals x.