Question

The equilibrium constant $K_c$ for$A_{\left(g\right)}\rightleftharpoons B_{\left(g\right)}$ is $1.1$. Which gas has a molar concentration greater than $1$?

Answer 1

$A\left(g\right)\rightleftharpoons B\left(g\right)K=1:1$

$K=\frac{K_f}{K_B}=\frac{\left[B\right]}{\left[A\right]}=\frac{1}{1}$

Hence $\left[B\right]=\left[A\right]$ at equilibrium.

Hence, both gases may have concentration greater or less than 1 or equal to 1.

But both should have same value.