The following table shows the results of liquid$-$phase laboratory$-$

scale reaction experiments in a $1\mathrm{.}0$ litre CSTR$,$

The feed composition is $1\mathrm{.}0$ and $2\mathrm{.}0mo{l}^{-1}$ of species A and $B$

respectively. The reaction stoichiometry is$,$

$2A+3B=$ Products

a$)$ Calculate the required residence time to achieve $90\%$

conversion of species A

b$)$ Calculate the expected conversion in a $1m^3$ CSTR when the

feed rate is $30m^3{h}^{-1}.$