How much carbon needs to be burned to produce 12.8 liters of carbon dioxide?

1. We make the equation:
C + O2 = CO2
2. We put x liters over carbon, 12.8 liters over gas.
3. We make a calculation for carbon:
n = 1 mol;
Vm = 22.4 L / mol;
V = n * Vm = 22.4 liters
4. Calculation for carbon dioxide:
n = 1 mol;
Vm = 22.4 L / mol;
V = n * Vm = 22.4 liters
5. make up the proportion:
From which we find x: x = 12.8 * 22.4 / 22.4 = 12.8 liter