Balance the above equation using proper coefficients. Al + Cr_2O_3 rightarrow Al_2O_3 According to the balanced chemical equation in a), if 40.0 g of Cr_2O_3 reacted with 8.00 g of aluminum, which is the limiting reagent In this reaction, Al or Cr_2O_3? Justify your answer. Calculate the theoretical yield of Cr in b. An analysis of the compound gives the following composition by mass: and O: 66.1%.