A sealed 2.0 L vessel initially containing only C(g) is allowed to reach equilibrium for the reaction C(g) ⇌ D(g). A particulate diagram taken at equilibrium shows 18 molecules of C and 42 molecules of D.
Which value is closest to the equilibrium constant K at this temperature?
a) 0.70
b) 2
c) 5.4
d) 0.50