I have a reactor operating at steady state. All the reactants and products are in the same phase. There is only one inlet and only one outlet.

Inside the reactor, the two balanced reactions shown below are occurring simultaneously.

$1$ A $+1$ B $=>4$ D

$1$ A $+1$ D $=>2$ E

The feed to the reactor is equimolar A & B$.$

The total molar flowrate of the outlet stream is $25\%$ larger than the feed stream. The molar fraction of E in the outlet stream is $0\mathrm{.}15.$

To solve this problem, you will need to find the total fractional conversion of A $($by both reactions$)$ and the Selectivity for the first reaction. The selectivity refers to the fraction of all A that is reacting that is consumed by the first reaction.

Put the Selectivity for the first reaction in the blank below, rounded to two decimals.