Sure, here's the translation of your request:

Initial concentration of $100$ mol$/$L$,$ liquid reactant at a flow rate of $200$ L$/$min enters a flow reactor. The reaction rate law is $-$rA $=$ kCA$^2$ with k $=50$ L$/$min$$mol$.$ Answer the following questions:

$1)$ Determine the reactor volume of an MFR required to achieve $80\%$ conversion of A$.$

$2)$ Calculate the conversion of A using a PFR with the same volume as in $1).$

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