The equilibrium of 2H2O(g) 2H2(g) + O2(g) at 2,000 K has a Keq value of 5.31 x 10-10. What is the Keq expression for this system?
A) [H2}^2[O2} / [H2O]^2
B) [H2][O2] / [H2O]
C) [H2O]^2 / [H2]^2[O2]
D) [H2O]^2 / [H2][O2]