Consider the reaction 2 A ⇄ 2 D + E. What is K for this reaction if [A] = 0.5 M, [D] = 0.5 M and [E] = 0.5 M at equilibrium?

Answer 1

I showed you how to do one of these already. What is your problem with this? BTW, I'm not hearing anything from you about what you don't understand or a stab at answering. My freebies to you without anything from you won't last much longer. You need to step up to the plate and help with learning how to do these.