$9\mathrm{.}4.$ We plan to run the reaction of Example $mo\frac{l}{m}in)$ in a plug flow reactor kept at $40C$ throughout to $90\%$ conversion. Find the volume of reactor needed.

$9\mathrm{.}5.$ Redo Example $9\mathrm{.}4$

$9\mathrm{.}6.$ Redo Example $9\mathrm{.}5$ where $C_{A0}=4mo\frac{l}{?}$ liter is replaced by $C_{A0}=1mo\frac{l}{l}$iter, and

$9\mathrm{.}7.$ Redo Example $9\mathrm{.}6$ where $F_{A0}$ remains unchanged at $1000$mol$\frac{A}{m}in.$

$9\mathrm{.}8.$ Redo Example $9\mathrm{.}7$