a 3.45 g mixture containing MgO (s) is placed in a 4.00L container. The container is filled with CO2 (g) to a pressure of 750 torr, at 23 degrees celcius. After the reaction has gone to completion, the pressure inside the flask is 410. torr, also at 23 degrees celcius. what is the m percentage of MgO in the mixture? (ume that other components of the mixture are unreative)
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