The atomic mass of iron is 55.85, and oxygen is 16.0. What is the mass of 6.02 × 1023 molecules of Fe2O3?
Since there are 2 molecules for Iron (Fe) and 3 for Oxygen (O), then we can do the equation.
= 55.85 2 + 3 16
= 159.7
So the correct answer is 159.7 g.
