[Joel]

I have another problem and I haven't found any good examples in my textbook =|

K_p is 1*10^-31 at 25 degrees celsius for the reaction N₂(g) + O₂(g) <--> 2NO(g)

N₂ and O₂ are inserted into a bottle, and the pressures are then p(N₂) = 0,8atm and p(O₂) = 0,2 atm.

How can i now calculate the equilibrium concentration for NO(g) at 25 degrees celsius as the amount of molecules / cm³

[kkrizka]

First write the equilibrium equation for it. With that you can calculate the partial pressure of NO. Then use the gas law to calculate the number of moles per mL. Using that you can calculate the number of molecules and it alread yis per cm^3 as it equals 1mL.