Using the following equation:
Fe2O3(s) + 3 H2(g) → 2 Fe(s) + 3 H2000)
a) How many grams of iron can be made from 6 moles H2

223.4 g of iron can be formed from 6 moles of hydrogen gas.

Explanation:

Fe₂O₃(s) + 3 H₂(g) → 2 Fe(s) + 3 H₂O(l)

Since the given equation is the balanced one, we need 3 moles of hydrogen gas to make 2 moles of iron, so the molar ratio is 3:2. So, from 6 moles of hydrogen gas, we can make few moles of iron as,

Molar mass of iron = 55.85 g

So amount of iron produced = 4 moles × 55.85 g/mol = 223.4 g of iron