530 grams

What Is The Mass Of 5 Moles Of Fe2O3? 2. What is the mass of 5 moles of Fe2O3 ? Smal x 159.0 1798.45g Page 2 3. How many grams is 0.5 moles of Fe2O3? Since there are 2 Iron and 3 Oxygen, the molar mass of Fe2O3 is: [ 2×55.9+3×16.0 ] = 159.8 g/mol.