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?
A)92 mmHg
B)644 mmHg
C)736 mmHg
D)828 mmHg

Question

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? 
A)92 mmHg 
B)644 mmHg 
C)736 mmHg 
D)828 mmHg

Quizplus · Accepted Answer

The pressure inside the tube can be calculated by subtracting the height of the mercury column inside the tube (9.2 cm) from the atmospheric pressure (736 mmHg), which gives 736 mmHg - 92 mmHg = 644 mmHg. Therefore, the correct answer is B.

What Is the Pressure of the Sample of Gas Trapped