angelc3205 angelc3205 06-06-2023 Chemistry contestada 18. Which equation represents an equilibrium system? 2Mg(s) + O₂(g) — 2MgO(s) O = CO₂ (s) CO₂(g) Agt (aq) + Cr (aq) — O 250₂(g) + O₂(g) — AgCl (s) 250, (g)