At a certain temperature, the following equilibrium reaction occurs:
A(g) + B(g) <=> C(g) + D(g)
Given the equilibrium constant (Keq) for this reaction is 25 at that temperature, if the initial concentrations of A and B are both 1.0 M, and C and D are initially at 0 M, what will be the equilibrium concentrations of A and B after the system reaches equilibrium?
Assume ideal gas behavior and no volume change during the reaction.