Example: Determine the amount of oxygen required for the combustion of 1 mole of methane.

Solution:

The balanced chemical equation for the combustion of methane is:

$$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$$

From the balanced chemical equation, we can see that 1 mole of methane reacts with 2 moles of oxygen. Therefore, for the combustion of 1 mole of methane, 2 moles of oxygen are required.