The Equilibrium Constant K for the Reaction Is 0213 at 640 K

The equilibrium constant K for the reaction $\mathrm { H } _ { 2 } ( \mathrm {~g} ) + \mathrm { CO } _ { 2 } ( \mathrm {~g} ) f \quad \mathrm { H } _ { 2 } \mathrm { O } ( \mathrm { g } ) + \mathrm { CO } ( \mathrm { g } )$ is 0.213 at 640 K. A mixture of gases that initially contains 0.0260 M H₂ and 0.0260 M CO₂ is allowed to equilibrate at 700 K. Calculate the final concentration of CO₂.

A) 1.779 × 10^-2
B) 8.203 × 10^-3
C) 0.213 × 10^-2
D) 0.026 × 10^-3
E) 0.052 × 10^-2