2hf(g)< > h2(g)+f2(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?
a. 2.1 x 10-2
b. 2.1 x 102
c. 1.2 x 103
d. 1.2 x 10-3