4AH(s)+3O2(g)+2Al2O3(s) in. What mole ratio would you use to calculate how many moles of oxygen gas would be needed to react completely with a given namber of moles of aluminum metal? 3molAl2molO4molA13molO2molAl3molO3molAl4molO b. What mole ratio would you use to calculate the number of moles of product that would be expected if a given number of moies of aluarsinian metal reacts compietely? 2molAl3molAl2O3 3molA!molAl2O3 4molAl2molAl2O3 4molAl2O3