Consider the reaction. 2 upper H upper F (g) double-headed arrow upper H subscript 2 (g) plus upper F subscript 2 (g).

At equilibrium at 600 K, the concentrations are as follows.

[HF] = 5.82 x 10-2 M
[H2] = 8.4 x 10-3 M
[F2] = 8.4 x 10-3 M

What is the value of Keq for the reaction expressed in scientific notation?
2.1 x 10-2
2.1 x 102
1.2 x 103
1.2 x 10-3