Question

question 7
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? (your answer should have 3 significant figures, the unit is mmhg)

question 8
a sample of pure oxygen gas has a pressure of 795 torr. what is the pressure of the oxygen in units of atmospheres? (3 significant figures)

question 9

Explanation:

Step1: Convert the height unit

Since \(1\ cm = 10\ mm\), then \(h = 9.2\ cm=92\ mm\).

Step2: Calculate the gas pressure

In an open - tube manometer, when the gas pressure is higher than the atmospheric pressure, \(P_{gas}=P_{atm}+h\). Given \(P_{atm} = 736\ mmHg\) and \(h = 92\ mmHg\), then \(P_{gas}=736 + 92\).

Answer:

\(828\)