the system is at equilibrium co2g h2g h2og cog

Question

The system is at equilibrium
CO₂(g) + H₂(g) *)
H₂O(g) + CO(g)
at some temperature.a vessel of 4.00 L contains 1.00 mole Carbon dioxide, 1.00 mole Hydrogen, 2.40 moles water, and 2.40 moles carbon monoxide. Determine how many moles of carbon dioxide should be combined to the system to bring the equilibrium carbon monoxide concentration to 0.715 mol/L?