The mole is one of the base units of the SI, and has the unit symbol [ mol] .
Standard volume of 1 mole of an ideal gas at 1 atmosphere and 0°C is 22.414 liters.
See also Molecular Weight - Common Substances
Example: Number of molecules in 1 mole of hydrogen gas.
Hydrogen gas contains H 2 molecules. 1 mole of a substance is 6.022141*10 23 molecules of the substance.
So; 1 mole of hydrogen gas contains 6.022141*10 23 H 2 -molecules
Example: Number of molecules in ethyl alcohol
The molecular weight of ethyl alcohol is 46.07 kg/kmol and the number of molecules in 1 kg can be calculated as
n = (1 [kg] / 46.07 [kg/kmol])* 6.022 10 23 [molecules/mol] * 1000 [mol/kmol]
= 1.31*1 0 25 [molecules]
The SI-system, unit converters, physical constants, drawing scales and more.
Dry air is a mixture of gases where the average molecular weight (or molar mass) can be calculated by adding the weight of each component.
Enthalpy, Entropy and Internal Energy of Carbon Dioxide gas.
Molar specific heats for some common gases at constant volume.
Calculate melting point of hydrocarbons from molecular weight (molar mass).
Mole fraction of water vapor is the ratio of water molecules to air and water molecules.
Definition and molecular weight (molar mass) of some common substances.
Enthalpy, internal energy and entropy of Nitrogen as an ideal gas.
Enthalpy, internal energy and entropy of oxygen as an ideal gas.
Definitions and examples of how to calculate wt%, molarity and how to prepare dilutions.
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