A. At equilibrium, the forward and reverse reactions have stopped. B. Decreasing the volume of the closed container at constant temperature would result in more MgO(s) being formed. C. If the container were opened to the atmosphere, eventually only MgSO4(s) would remain. D. If pure MgSO4(s) were placed in a closed container filled with N2(g) at 1 atm, the total pressure would increase, due to SO3(g) being formed. E. The same equilibrium condition would result if we started with only pure MgSO4(s) in a closed container as if we started with only pure MgO(s) in a closed container.
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