A metal forms the fluoride MF3. Electrolysis of the molten fluoride by a current of 3.86 A for 16.2 minutes deposits 1.25 g of the metal. Calculate the molar mass of the metal.

Step by Step Solution: Step 1. Determine the amount of charge that passed through the electrolytic cell using Faraday's law of electrolysis: Q = I * t Step 2. Convert the charge to moles of metal deposited using the Faraday constant (F = 96,485 C/mol): n = Q / F Step 3. Calculate the molar mass of the metal using the mass of metal deposited (m) and moles of metal deposited (n): M = m / n Final Answer: M = 118.7 g/mol