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Question: a 489 gram sample of n2 gas is placed in...

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A 4.89 gram sample of N2 gas is placed in a flask connected to an open ended manometer. Atmospheric pressure is 760 mmHg. Temperature is 25.5 degrees Celsius. The mercury level in the arm of the manometer connected to the flask is 3.00 cm higher than the open arm of the flask. Then, 0.070 grams of an unknown gas is added to the flask. The temp is constant, but mercury level changes so that the level on the side connected to the flask is 1.70 cm below the level in the open end.

A) determine the molar mass of the unknown gas.
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