To understand several methods of measuring gas pressure. Gases exert a measurabl

Question

To understand several methods of measuring gas pressure. Gases exert a measurable pressure (P) on the walls of their container. The SI unit for pressure is the pascal (Pa). Other pressure units frequently used in chemistry are millimeters of mercury (mmHg) and atmospheres (atm). You can convert between units of pressure using conversion factors such as those indicated below. 1 atm=760 mmHg=101,325 Pa

Part A

On a rainy day, a barometer reads 737 mmHg . Convert this value to atmospheres.

Express your answer numerically in atmospheres

Part B

A closed container is filled with oxygen. The pressure in the container is 445 kPa . What is the pressure in millimeters of mercury?

Express the pressure numerically in millimeters of mercury.

Part C

What is the pressure (in atmospheres) of the gas inside the container connected to an open-end, mercury-filled manometer as shown in the picture? (Figure 1) The atmospheric pressure is 0.95 atm.

Express your answer numerically in atmospheres.

Explanation / Answer

part A )

737 mm Hg

1 atm -------------> 760 mmHg

x atm --------------> 737 mmHg

x = 737 x 1 / 760

x = 0.970 atm

pressure = 0.970 atm

part B)

1 kPa = 7.50 mm Hg

445 kPa = 7.50 x 445 mmHg

     = 3337.5 mmHg

part C)

no figure is here so i cannot solve this problem

i

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