Equal amounts of gases A and B are placed in a closed reactor. A and B react to combine into AB in the following equilibrium reaction: A + B ⇌ AB Which are true about this system? Select two that apply. -A closed system allows for the transfer of energy in and out, so energy is not conserved in this system. -The total mass in the reactor gradually becomes zero because mass is consumed in closed systems. -The total mass in the reactor remains the same because products are removed from closed systems. -The total mass in the reactor remains the same because mass is conserved in closed systems.
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