Reaction to produce $B$ from a reactant $A(AB)$ is carried out in this constant volume reactor.

Calculate the time necessary to consume $99\mathrm{.}9\%$ of $A,$ given that initial concentration of $A,C_{A0}=0\mathrm{.}5mo\frac{l}{d}{m}^3$ when

a$)-r_A=k,$ with $k=0\mathrm{.}05mo\frac{l}{h}*d{m}^3$

b$)-r_A=k{C}_A,$ with $k=0\mathrm{.}0001s^{-1}=0\mathrm{.}36h^{-1},-V_A=0\mathrm{.}18$

$V=1$ UOU UIII ${?}^{-}$

c$)-r_A=k{C}_{A2},$ with $k=0\mathrm{.}03d\frac{m^3}{m}ol.h=$