Consider the balanced chemical equation 4Al(s)+3O2(s)2A2O3(s) a. 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 metai? 3molAl2molO4molAl3molO2molAl3molO3molAl4molO b. What mole ratio would you use to calculate the number of moles of product that would be expected if a glven number of moles of aluminumi metal reacts completely? 2molA!3molAl2O33molAl2molAlO34molAl32molAl2O32molA!4molAO2O3