C(g) + 2A(g) ⇌ 3E(s) + 2F(g)

The concentrations of C, A, and F are measured as 0.2 M, 0.2 M, and 0.4 M at equilibrium and at 100 K.

What is the value of the equilibrium constant?

Write the expression for Keq, plug in the numbers and calculate K.