You must show ALL WORK and INCLUDE UNITS in order to get credit!
How many moles of aluminum are needed to react completely with 1.2 moles of FeO.
2Al(s) + 3FeO(s) ⟶ 3Fe(s) + Al₂O₃(s)
We can use the mole ratio between aluminum and FeO from the balanced chemical equation to determine the number of moles of aluminum needed to completely react with 1.2 moles of FeO:
2Al(s) + 3FeO(s) ⟶ 3Fe(s) + Al₂O₃(s)
2 moles of Al react with 3 moles of FeO
1 mole of Al reacts with 3/2 moles of FeO
Therefore, to completely react with 1.2 moles of FeO:
1.2 moles FeO × (1 mole Al / (3/2) moles FeO)) = 0.8 moles Al
So 0.8 moles of aluminum are needed to react completely with 1.2 moles of FeO.