Oxygen (O2)
Pressure: 1 atm; Volume: 22.4 L; Mass: 32 g; Temperature: 273.15 K; Ideal Gas Constant (R): 0.0821 L路atm/(mol路K)
Molar Mass: 32.03659286 g/mol
Molar Mass of Gas Calculator
Chemistry0.0(0)
Calculates the molar mass of a gas using the ideal gas law (PV = nRT), where molar mass (M) = mass / moles. This calculator rearranges the ideal gas law to solve for molar mass: M = (mass * R * temperature) / (pressure * volume).
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How To Use
How to use this calculator
Start with your values, or try a preset.
Step 1
Enter Pressure, Volume, Mass, Temperature, and Ideal Gas Constant (R) in the units shown.
Step 2
Read Molar Mass in the results panel. Results update as you change the inputs.
Step 3
Choose a preset to load an example, then adjust the values for your situation.
Worked Examples
Example calculations
See the inputs and their calculated results.
Nitrogen (N2)
Pressure: 1 atm; Volume: 22.4 L; Mass: 28 g; Temperature: 273.15 K; Ideal Gas Constant (R): 0.0821 L路atm/(mol路K)
Molar Mass: 28.03201875 g/mol
Carbon Dioxide (CO2)
Pressure: 1 atm; Volume: 22.4 L; Mass: 44 g; Temperature: 273.15 K; Ideal Gas Constant (R): 0.0821 L路atm/(mol路K)
Molar Mass: 44.05031518 g/mol
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