Given That at Equilibrium $[ \mathrm { A } ]$ =0072 M And Equilibrium

Multiple Choice

Given that at equilibrium $[ \mathrm { A } ]$ =0.072 M and $[ \mathrm { B } ]$ =0.089 M at 40 ${ } ^ { \circ } \mathrm { C }$ , calculate the equilibrium constant $K$ from the equilibrium concentrations for the reaction $A ( g ) f \quad B ( g )$ .

A) $K = 0.072$
B) $K = 0.161$
C) $K = 1.23$
D) $K = 0.006$
E) $K = 0.089$