Answer:28.83g
Explanation: firstly write a balance equation for the reaction, which will be in this form C3H8 +4O2>>>>3CO2+ 4H2O. Then get the number of moles of propane and also for oxygen. Propane:0.227moles and oxygen: 0.901moles according to our eqution since the ratio is 1:4(1C3H8:4O2). Now convert the moles of O2 to mass, then it will be 28.83g
