Methane $($CH$4)$ and oxygen $($O$2)$ react in the presence of a catalyst to formformaldehyde $($HCHO$).$ In a parallel reaction methane is oxidized to carbon dioxide$($CO$2)$ and water $($H$2$O$)$ :CH$4+$ O$2$ HCHO $+$ H$2$OCH$4+2$O$2$ CO$2+2$H$2$OSuppose $100$ mol$/$s of equimolar amount of methane and oxygen is fed to acontinuous reactor. The fractional conversion of methane is $0\mathrm{.}9$ and the fractionalyield of formaldehyde is $0\mathrm{.}855.$ Calculate the molar composition of the reactoroutput stream and the selectivity of formaldehyde production relative to carbondioxide production using molecular species balances.