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.