How many moles of aluminum are needed to react completely with 1.2 moles of FeO.
2Al(s) + 3FeO(s) ⟶ 3Fe(s) + Al₂O₃(s)
The balanced chemical equation indicates that 2 moles of aluminum react with 3 moles of FeO.
Therefore, we can use a proportion to determine how many moles of aluminum are needed to react completely with 1.2 moles of FeO:
2 mol Al / 3 mol FeO = x mol Al / 1.2 mol FeO
x = 0.8 moles of aluminum are needed to react completely with 1.2 moles of FeO.