How many g of C3H8 are needed to produce 96 g CO2? The balanced equation is below.
C3H8 + 5O2 (arrow) 3CO2 + 4H2O
C3H8 + 5O2 (arrow) 3CO2 + 4H2O
How many moles of CO2 do you want? That's mols = g/molar mass = 96 g/44 = 2.18
Convert 2.18 mols CO2 to moles C3H8 needed: that's
2.18 mols CO2 x (1 mol C3H8/3 mols CO2) = 2.18/3 = 0.726
Now convert to grams C3H8. That's g =moles C3H8 x molar mass C3H8 = ??