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11 September, 14:52

What is the pressure in a gas container that is connected to an open-end u-tube manometer if the pressure of the atmosphere is 742 torr and the level of mercury in the arm connected to the container is 8.60 cm higher than the level of mercury open to the atmosphere?

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  1. 11 September, 15:14
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    First, know that 8.60 cm = 86.0 mm, which is equivalent to an 86.0 torr pressure difference between the atmosphere and the container.

    In this situation the pressure in the container is less than the atmosphere.

    742 - 86 = 656 torr
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