In a rigid vessel, the reaction
2P(g) ⇌ Q(g)
has reached equilibrium. A particulate diagram reveals 80 particles of P and 10 particles of Q in the vessel. What is the value of the equilibrium constant K?
a) 1.25×10−1
b) 3.91×10−4
c) 1.56×10−3
d) 1.56×10−2