A continuously stirred tank reactor $($CSTR$)$ is being used to $120\frac{m^3}{h}r$ of an industrial wastewater with an influent concentration of $100m\frac{g}{L}.$ The tank has a volume of $600m^3.$ In the tank, the contaminant is expected to be removed by a first$-$order reaction with a rate coefficient of $\frac{0\mathrm{.}8}{h}{r}_3$

a$.$ Draw a diagram and write the mass balance equation for the well$-$mixed reactor.

b$.$ Calculate the contaminant concentration in the effluent of the well$-$mixed reactor.

$m\frac{g}{L}$

c$.$ Calculate the total mass of contaminant in the reactor. Report your answer in kilograms.

$kg$

d$.$ Calculate the percent removal of contaminant.

$\%$