The atomic mass of iron is 55.85, and oxygen is 16.0. what is the mass of 6.02 × 1023 molecules of fe2o3? 71.85 g 143.7 g 159.7 g 199.55 g 215.55 g

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.