Manometers and Pressure Conversions

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?

• 0.057 atm

• 1.1 atm

• 2.8 atm

• 3.6 atm

1. What will happen to the height (h) of the mercury column in the manometer shown below if the stopcock is opened, given that the atmospheric pressure is 755 mmHg?

• h will decrease

• h will not change

• h will increase

• not enough information given to answer the question

Which gas has a greater pressure?

• air

• methane

• The gas pressures are equal

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

• 740 mmHg

• 770 mmHg

• 710 mmHg

• 30 mmHg

Which gas has a greater pressure?

• Gas B

• The air

• The air and Gas B have equal pressures

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