What volume of oxygen is needed to completely combust 2.36 L of methane gas #CH_4#?
A volume of
The combustion reaction is stoichiometrically balanced: garbage out equals garbage in. At a given temperature and pressure equal volumes of gas contain equal numbers of molecules.
Thus if we have a volume of methane, it will require DOUBLE the volume of dioxygen gas for stoichiometric reaction. You supplied the volume of methane gas in your starting conditions.