How much oxygen is required to completely burn 36g of carbon?

1. According to the periodic table, we determine the molar mass of carbon, 12 g / mol
2. Find the number of moles of carbon, divide 36 g by molar mass, we get 3 moles
3. Since according to the reaction equation C: O2 = 1: 1, then the number of moles of carbon is equal to moles of oxygen and is equal to 3 moles
4. To find the volume of O2 3 mol, multiply by the molar volume (22.4 l / mol), we get 67.2 liters