Pick the variable you want. Set the other three with the sliders and the answer appears, worked out step by step. The grayed slider is the one the equation is solving for you.
| P in atm | |
| V in liters | |
| n in moles | |
| T in kelvin | |
| Volume per mole |
At 0 °C and 1 atm the volume per mole should land on 22.4 L. Try the STP button and watch it happen.