Multiple Choice
At sea level, what is the standard atmospheric pressure at point A expressed in millimeters of mercury (mm Hg)?
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7. Gases
Pressure Units
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
In the context of pressure units, what does 'atm' stand for?
A
Ampere
B
Absolute temperature
C
Atomic mass
D
Atmosphere
Verified step by step guidance1
Understand that 'atm' is a unit used to measure pressure in chemistry and physics.
Recognize that 'atm' stands for 'atmosphere,' which is a unit of pressure based on the average atmospheric pressure at sea level on Earth.
Recall that 1 atmosphere (1 atm) is defined as exactly 101,325 Pascals (Pa) in the SI unit system.
Note that 'atm' is different from other units such as Ampere (A) which measures electric current, Absolute temperature which is measured in Kelvin (K), and Atomic mass which is measured in atomic mass units (amu).
Conclude that in the context of pressure units, 'atm' correctly stands for 'atmosphere.'
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