Enter the volume of a substance in liters and its molar mass to convert to moles. This calculator assumes the substance is an ideal gas at standard temperature and pressure (STP).
Liters To Moles Formula
The following formula is used to convert liters to moles for an ideal gas at STP:
n = V / VM
Variables:
- n is the number of moles (mol)
- V is the volume of the gas (liters)
- VM is the molar volume of an ideal gas at STP (22.414 liters/mol)
To calculate the number of moles from the volume of a gas at STP, divide the volume by the molar volume of an ideal gas at STP.
What is the Molar Volume?
The molar volume is the volume occupied by one mole of an ideal gas at standard temperature and pressure (STP), which is defined as 0 degrees Celsius and 1 atmosphere of pressure. The molar volume of an ideal gas at STP is 22.414 liters per mole.
How to Calculate Moles from Liters?
The following steps outline how to calculate the number of moles from the volume of a gas at STP.
- First, determine the volume of the gas (V) in liters.
- Next, use the molar volume of an ideal gas at STP (VM), which is 22.414 liters/mol.
- Next, gather the formula from above = n = V / VM.
- Finally, calculate the number of moles (n).
- After inserting the variables and calculating the result, check your answer with the calculator above.
Example Problem :
Use the following variables as an example problem to test your knowledge.
Volume of the gas (V) = 44.828 liters
Molar volume of an ideal gas at STP (VM) = 22.414 liters/mol
Number of moles (n) = ?
Using the formula, n = V / VM:
n = 44.828 / 22.414 = 2 moles
