7 ms·> 3CO2 + 12H2 -> C3H8 + 6O2 6 O on the left, 12 on the right. 24 H on the left, 8 on the right.by jwilk 3y ago> 3CO2 + 12H2 -> C3H8 + 6O2 6 O on the left, 12 on the right. 24 H on the left, 8 on the right.