Why do chemists use a mercury column to measure pressure?
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Air molecules push down on the surface of the mercury. Because the inside of the tube is a vacuum, the mercury rises inside the tube. The height to which the mercury rises is dependent on the external air pressure. (A) A barometer measures atmospheric pressure as the height of a column of mercury.
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because the inside the tube is a vacuum the Mercury Rises inside the tube the height to which the Mercury Rises is dependent on the external pressure a barometer measures atmospheric pressure is the height of a column of Mercury
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