5.88 moles of nitrogen and 16.2 moles of oxygen are mixed until the equilibrium is established 11.28 moles of nitric acid are formed calculate the value of equilibrium constant

Answer 1

Do you have an equation to use? I don't see how you can get HNO3 out of N2 and O2.

Answer 2

Nitric oxide is formed and the equation is
N2 + O2 <--> 2NO
Calculate the equilibrium constant now?