An exercise about chemical equilibrium

[samy4408]

Homework Statement

my answer is an image in the post

Relevant Equations

no particular equations

Hello i am trying to solve a problem set about chemical equilibrium , the issue is that my results don't correspond to the correction . can someone tell me what is wrong with my answer , thanks
here is the problem and his correction :

here is my answer :

 

[LCSphysicist]

It seems that you forgot to exponentiate the concentration of mols, that is:

$$ k = \frac{[NO]^2[Br_2]}{[NOBr]^2} $$

 

[Borek]

that^^^

Strange that the question lists NO as a solid. That would mean temperature below -164°C, at the same time NOBr boils at 15°C, so it would be solid as well. Doesn't make much sense.