mass of CuCl = (mass of Cu2O) ÷ (Molar mass of Cu2O) x (2 moles of CuCl / 1 mole of Cu2O) x (Molar mass of CuCl)

mass of CuCl = (73.5 g) ÷ (143.09 g/mol) x (2/1) x (98.999 g/mol)

mass of CuCl = 101.7 g

Again, all of these problems are solved in exactly the same way. You can do them using the process you've been shown.