\begin{equation}\label{eq:o2-required-air-cpp} O_{2,req} = \sum_{i} O_{2,gen,i} \cdot x_{i} \qquad\end{equation}

\begin{equation}\label{eq:gas-composition-set-stoichometric-air-cpp} Air_{stoich} = O_{2,req} \cdot \left(1 + \frac{1 - k_{O_2}}{k_{O_2}}\right)\end{equation}

\(O_{2,req}\)	Oxygen required for combustion \([\unit{ \pound}]\)
\(O_{2,gen,i}\)	Oxygen generated per constituent i \([\unit{ \pound}]\)
\(x_{i}\)	Volume fraction of constituent i \([\unit{ \unitless}]\)
\(k_{O_2}\)	Volume fraction of O_2 in dry air \([\unit{ \unitless}]\)
\(Air_{stoich}\)	Stoichiometric air required \([\unit{ \pound}]\)