ChanceFuller ChanceFuller 12-07-2017 Chemistry contestada I NEED HELP! I WILL RATE BRAINLIEST!!!! Given the reaction, Fe2O3 + 3 CO 2 Fe + 3 CO2, if 12.0 moles of CO2 are made, then how many moles of CO were used? 12.0 moles 6.0 moles 4.0 moles 3.0 moles