16. Consider the decomposition equation of a compound: C5H6O3(g)⇌C2H6(g) + 3CO(g). When a 5.63-g sample ofpure C5H6O3(g) was sealed into an otherwise empty 2.50-L flask and heated to 200℃, the pressure in the flask gradually rose to1.63 atm and remained at that value. The K value for this reaction is _____ .
(A)