Manometer Readings

What is the pressure of the sample of gas trapped in the open-tube mercury manometer shown below if atmospheric pressure is 736 mmHg and h = 9.2 cm?

• 92 mm Hg

• 736 mm Hg

• 745.2 mm Hg

• 828 mm Hg

Which gas has a greater pressure?

• air

• methane

• The gas pressures are equal

If the air pressure is 750 mmHg, what is the pressure of Gas B?

• 695 mmHg

• 805 mmHg

• 750 mmHg

• 55 mmHg

What is the pressure of gas C if the air pressure is 760?

• 1405 mmHg

• 645 mmHg

• 115 mmHg

A manometer is used to measure the pressure of an unknown gas. What is the Pressure of the unknown gas? (atmospheric pressure = 100 kPa, density of mercury = 13,600 kg/m³)

• 121.8 kPa

• 128.6 kPa

• 106.8 kPa

• 93.2 kPa

If the atmospheric pressure is 740 mmHg, what is the pressure of the methane gas?

• 740 mmHg

• 770 mmHg

• 710 mmHg

• 30 mmHg