Answer:
a) 119 g/mol
Explanation:
-We apply the formula for freezing point depression to obtain the molality of the solution:

#We use the molality above to calculate the molar mass:

Hence, the molar mass of the compound is 119 g/mol
It will have an overall positive charge.
That law is known as Boyle's Law, "The volume of a given mass of a gas is inversely related to pressure when the temperature is constant"