Question

At 1280

°

C the equilibrium constant Kc for the reaction
 

Br2(g) ⇌ 2Br(g)

 
is 1.1 

×

 10−3. If the initial concentrations are [Br2] = 0.0420 M and [Br] = 0.0390 M, calculate the concentrations of these two species at equilibrium.

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