Fe2O3 + 3 C → → 2 Fe + 3 CO How many grams of Fe are formed when 11 mol of CO is produced?

Answer 1

So, you have asked a bunch of questions that are essentially the same. I will attempt to explain how to approach these, and hopefully you'll be able to do them.

We always work in MOLES first. So we convert to moles, and then back to grams. In this problem, we are given the MOLES of CO and asked for the GRAMS of Fe.

We must use the balanced equation in all of these problems.

Fe₂O₃ + 3C ==> 2Fe + 3CO ... balanced equation

? gms...........................11 mols

First, find the MOLES of Fe₂O₃ using the mol ratio in the balanced equation:

11 mols CO x 1 mol Fe₂O₃/ 3 mols CO = 3.667 mols Fe₂O₃

Now, use the molar mass of Fe₂O₃ (159.7 g/mol) to find the grams of Fe₂O₃:

3.667 mols Fe₂O₃ x 159.7 g / mol = 585.57g Fe₂O₃

Finally, report the answer to the correct number of sig. figs. = Fe₂O₃ (2 sig. figs.)