Consider the balanced chemical equation 4Al(s) + 3O2 (g) -> 2Al₂O3 (s)
What mole ratio would you use to calculate how many moles of oxygen gas would be needed to react completely with a given number of moles of aluminum metal? What mole ratio would you use to calculate the number of moles of product that would be expected if a given number of moles of aluminum metal reacts completely?