.Hydrogen bromide, HBr(g), decomposes at 700 K, as
represented by the following reaction:
2HBr(g) —>H2(g) + Br₂(g)
Keq is 4.2 × 10^-9 for this reaction. If 0.090 mol of
hydrogen bromide is placed into a 2.0 L reaction
vessel and heated to 700 K, what is the equilibrium
Concentration of each gas?