The pressure of a sample of a gas is measured in an open-end manometer containing mercury. The mercury level in the open arm is 12.5 cm below the level in the other arm. If the atmospheric pressure is 760.0 mm Hg, what is the pressure of the gas? QUESTION 1 O A 125 mm Hg B. 635 mm Hg OC885 mm Hg O D.760.0 mm Hg

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