A first order reversible reaction A 2R was performed in a liquid-phase batch reactor. When the reaction was run, several samples were taken from the reactor to determine the concentration of A and titrated with a solution of 0.675 M in an ampoule containing 52.5 mL of sample. The data in the table indicate the titrated volume in different reaction times (CRO-0): t (min) 0 V (mL) O 1.46 O 2.70 O 2.16 What is the equilibrium constant for the given reaction condition? O 8.64 10 O 10.8 52.5 35 30 8 18.9 10.5