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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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Roro1920 Roro1920
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6 years ago
Gases are different from solids and liquids. In a sample of gas, the molecules are far apart. The gas molecules also move around and collide with each other as well as with the walls of the container. These collisions generate pressure. The pressure of a gas can be measured in different units. One convenient unit of measure is called the atmosphere (atm) because it is based on atmospheric pressure. At sea level, the average pressure is 1 atm. As you get higher in altitude, the pressure steadily drops until you leave the atmosphere, where the pressure is very close to 0 atm.
The table below shows the different commonly used units of measuring gas pressure. Use this table in the pressure unit conversions.

Unit   Abbreviation   1 atm equivalent
atmosphere   atm   1.00 atm (exact)
millimeters of mercury   mmHg   760 mmHg
torr   torr   760 torr
inches of mercury   in.Hg   29.9 in.Hg
pounds per square
inch (psi)   lb/in.2   14.7 lb/in.2
pascal   Pa   101,325 Pa
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bolbolbolbol
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4 years ago
thanks
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