Equilibrium Consider the following endothermic reaction at 345.0 °C. HBr (g) ⇌ H2 (g) + Br2 (g)   , kp=4.18×10-9 A reaction vessel initially contains a partial pressure of HBr of 0.20 atm. Calculate The equilibrium constant kc for this reaction at 345.0 °C.

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