Equilibrium of H2 Br2 and HBr

Question

What’s the equilibrium concentrations of H2 Br2 and HBr

Answer 1

I'll assume the reaction to which you refer is

H₂ + Br₂ ==> 2HBr

Keq = [HBr]² / [H₂] [Br₂]

Without additional information, we can't answer your question. We would need to know the value of Keq, and some other information about the initial concentrations. Heck, you didn't even tell us what the reaction was. I had to guess, and I may not have guessed correctly.