For the reaction A + B C + D, g-o is calculated to be 0 at

For the reaction A + B ↔ C + D, Δg-o is calculated to be 0 at 500 K.
Starting with a mixture of 1 kmol of A and 1 kmol of B,
(a) Evaluate what percent of the mixture is converted to products at equilibrium at 500 kPa, 500 K.
(b) What would be the answer if the pressure (p) were 1000 kPa?