The most common units of pressure are Pascal, Newton, atmosphere, inches of mercury, millimeters mercury or Torr, and pounds per square inch.
These units vary in terms of metric units. They can even be ranked from highest to lowest.
Pressure can be defined as force per unit area. For each of the unit measurements, there's a corresponding values.
The first one is Pascal or Pa. This is the standard unit of pressure. It is relatively a small unit measure so most often, the KPa or KiloPascal is used, specially in gas pressures.
Meanwhile, a standard atmospheric pressure is 1 atm, which is also equal to 760 millimeters Mercury or mmHg. It is also equal to 101.3 KiloPascual or KPa. Sometimes, atmospheric pressure is stated in pounds per square inch or psi. the atmospheric pressure at sea level has an equivalent value of 14.7 psi.
least to greatest
Explanation:
The most common units of pressure are Pascal, Newton, atmosphere, inches of mercury, millimeters mercury or Torr, and pounds per square inch.
These units vary in terms of metric units. They can even be ranked from highest to lowest.
Pressure can be defined as force per unit area. For each of the unit measurements, there's a corresponding values.
The first one is Pascal or Pa. This is the standard unit of pressure. It is relatively a small unit measure so most often, the KPa or KiloPascal is used, specially in gas pressures.
Meanwhile, a standard atmospheric pressure is 1 atm, which is also equal to 760 millimeters Mercury or mmHg. It is also equal to 101.3 KiloPascual or KPa. Sometimes, atmospheric pressure is stated in pounds per square inch or psi. the atmospheric pressure at sea level has an equivalent value of 14.7 psi.
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Problem:
What is the molecular weight of a molecule of water, H2O? (Amu= atomic mass unit)
Given Data:
Oxygen = 15.999 atomic mass unit (amu)
Hydrogen = 1.0079 atomic mass unit (amu)
Note: H2O contains 2 atoms of hydrogen and 1 atom of Oxygen
Hydrogen = 1.0079 amu × 2 = 2.0158 amu (H2)
Oxygen = 15.999 amu × 1 = 15.999 amu (O)
Solution:
Add the atomic mass unit of 2 hydrogen to the atomic mass unit of 1 oxygen.
H2O = 2.0158 amu + 15.999 amu = 18.0148 amu
We can also say that 1 mole of H2O is equal to 18.0148 grams.
Molar mass of H2O = 18.0148 grams/mol
H2O has 18.0148 atomic mass unit (amu)
H2O has a molar mass of 18.0148 grams / mol
Hope it helps...=)
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