Question $4\mathrm{.}1$: A reaction with stoichiometry $(2C_2{H}_4+O_{2}2C_2{H}_{4}O)$ takes place in a process

Complete the mass balance in the above chart and then, answer the following questions:

What is the overall conversion of $C_2{H}_4$ for this process? What is the single$-$pass conversion?

The separation unit and recycle compressor and piping are expensive. Why not eliminate them and sell the effluent from the reactor as is$?$ Alternatively, why not keep the separator but discard the bottom stream instead of recycling it$?$

Suppose a trace amount $($say$,0\mathrm{.}1\%)$ of an impurity material $C$ is contained in the fresh feed and all of it stays in the gas effluent stream from the separation unit $($and so is recycled$).$ Why would the process eventually shut down? What would you have to do to get it to work?

Why not design the reactor to produce $50mo\frac{l}{s}{C}_2{H}_{4}O$ from $60mo\frac{l}{s}{C}_2{H}_4$ in a single pass, thereby eliminating the need for the separation and recycle?