Question

A closed end manometer was attached to a vessel containing argon. The difference in mercury levels in the two arms of the manometer was 12.2 cm. Atmospheric pressure was 783 mmHg. What was the pressure of the argon in the container, in mmHg?

a) 882
b) 661
c) 122
d) 795
e) 771

Answer 1

In a closed-end manometer, the difference in the heights of the mercury columns gives the pressure of the gas directly. Given that the difference in the mercury levels in the two arms of the manometer is 12.2 cm, we can determine the pressure of the argon in the container. To convert the height difference to mmHg, we multiply the cm value by 10. So, the pressure of the argon is 122 mmHg.

Step-by-step explanation:

In a closed-end manometer, the difference in the heights of the mercury columns gives the pressure of the gas directly.

Given that the difference in the mercury levels in the two arms of the manometer is 12.2 cm, we can determine the pressure of the argon in the container.

To convert the height difference to mmHg, we multiply the cm value by 10. So, the pressure of the argon is 122 mmHg.