How much o2 is required for the complete reaction of 36 g of c3h6 to form co2 and h2o?

2 C3H6 + 9 O2 - > 6 CO2 + 6 H2O.

36 g / 42.0 gmole-1 = 0.857 mole. The amount of oxygen is 0.857 X 9/2 (from the reaction) = 3.857 mole for oxygen. This equals 3.857 X 16 g/mole = 61.7 g of oxygen. l