The following reaction has Kp = 109 at 25°C.

2 NO(g) + Br2(g) 2 NOBr(g)
If the equilibrium partial pressure of Br2 is 0.0159 atm and the equilibrium partial pressure of NOBr is 0.0768 atm, calculate the partial pressure of NO at equilibrium.

3 answers

K = (NOBr)^2/(NO)^2(Br2)
You have only one unknown. Solve for it.
0.076
45