A manometer is connected to a gas containing bulb. The open arm reads 45.0 cm whereas the arm connected to the bulb reads 26.0 cm. If the barometric pressure is 760 mm mercury, what is the pressure of

Question

A manometer is connected to a gas containing bulb. The open arm reads 45.0 cm whereas the arm connected to the bulb reads 26.0 cm. If the barometric pressure is 760 mm mercury, what is the pressure of gas, in atm?

TestHub · Accepted Answer

The open arm stands higher, so the gas pressure exceeds atmospheric pressure. Δ h = 45.0 - 26.0 = 19.0 cm = 190 mm Hg. P gas = 760 + 190 = 950 mm = 950/760 = 1.25 atm. Matches (b).

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