Problem: $HCl$ and $O_2$ react to form $C{l}_2$ and $H_{2}O.$ Sufficient air $(21$mole$\%O_2,79\%$

$N_2)$ is fed to provide $35\%$ excess oxygen and the fractional conversion of $HCl$ is

$85\%.$

Write the complete balanced equation.

Write the $v_i$ for all species involved.

Draw a complete flowchart.

Calculate the mole fractions of the product stream components, using atomic

species balances, molecular balances, and extent of reaction balances.