$(15$ pts$)$ Consider a process for the partial oxidation of benzene to produce maleic anhydride

$(C_4{H}_2{O}_3)$ using air. There are two reactions to be concerned with: The first partially oxidizes the

Benzene to produce maleic acid along with carbon dioxide and water. The second, undesired

reaction, fully oxidizes the benzene. The process used is as follows:

Benzene Purification: The benzene flows into a pressurized still with water at $23\mathrm{.}2a.$ The liquid

in the still is $80\%$ benzene by mass. Energy is supplied to keep the mixture at its boiling point $(180F)$

resulting in a vapor mixture of pure water and pure benzene. The contaminates along with waste

benzene flow out as a liquid.

Reaction: The vapor stream is mixed with enough air relative humidity$)$ to

provide an $\frac{18}{1}$ molar ratio of oxygen$/$benzene entering the reactor. At the exit to the reactor an

analysis of the gasses $($mole$,$ dry basis$)$ shows $0\mathrm{.}76\%$ maleic acid $)$shows $0\mathrm{.}76\%$ maleic acid $($C$4$H$4$O$4,)$ and $80\mathrm{.}0\%$ nitrogen.

$3)$ Stripping: The exit gasses from the reactor flow into a water scrubber operating at $1$ atm. Pure

water enters the top of the column and the reactor outlet gas enters the bottom. The water $$scrubs$$

out the maleic acid where it exits as a liquid at the bottom of the column with a concentration of

$($mole $\%)12\%$ C$4$H$4$O$4,88\%$ water. Exiting the top of the column as a gas are all of the unreacted

benzene, oxygen, carbon dioxide, and nitrogen. This gas stream exits at $142\backslash$deg F saturated with water.

$4)$ Drying: The liquid stream from the scrubber goes to a dryer where the water is driven off leaving

pure maleic anhydride

What is $($use pound moles$)$:

a$.$ The moles of benzene that are completely oxidized in the reactor per mole of benzene fed into the

reactor? $($i$.$e$.$ the moles benzene used in the second reaction per mole fed$)$

b$.$ The pounds of water leaving the dryer per mole of benzene fed into the reactor?

c$.$ The composition of the gas leaving the scrubber $($mole percent, wet basis$)?$

d$.$ The pounds of water added to the top of the scrubber per mole of benzene fed into the reactor?

Need help with a$,$b$,$c$,$d and diagrams as well