Substance R(g) reacts to form P(g), which then may isomerize to either P1(g) or P2(g). The diagram b — Thermodynamics Chemistry Question

Substance R(g) reacts to form P(g), which then may isomerize to either P₁(g) or P₂(g). The diagram below shows ΔG° at 25 °C.

In an experiment, 10.0 g of R(g) is placed in a sealed vessel. Which are true at equilibrium?
I. The mass of R(g) is 0.0 g.
II. The mass of P₁(g) is less than the mass of P₂(g).