Respuesta :
Answer: B: [C]
Explanation: [tex]H_2O(g)+C(s)\leftrightharpoons H_2(g)+CO(g)[/tex]
Equilibrium constant is defined as the ratio of the product of the concentration of products to the product of the concentration of reactants each raised to their stochiometric coefficient.
[tex]K=\frac{[H_2][CO]}{[H_2O][C][/tex]
But the concentration of solids in their standard state is taken as 1.
Thus [C(s)] =1
[tex]K=\frac{[H_2][CO]}{[H_2O][/tex]
