Liters at STP to Moles Converter
Common Conversions
| L (STP) | mol |
|---|---|
| 0.224 | 0.01 |
| 1 | 0.04461 |
| 2.241 | 0.1 |
| 5 | 0.2231 |
| 10 | 0.4461 |
| 11.207 | 0.5 |
| 22.414 | 1 |
| 44.828 | 2 |
| 100 | 4.461 |
| 224.14 | 10 |
| 1000 | 44.615 |
Why this conversion matters in chemistry
Catalytic peroxide decomposition collecting evolved O₂ over water is the textbook lab where this conversion shows up. 1.12 L of dry O₂ collected at 0 °C and 1 atm corresponds to 1.12 / 22.414 = 0.0500 mol — match against the 2 H₂O₂ → 2 H₂O + O₂ stoichiometry and you have 0.100 mol of peroxide consumed. A factor of 22.414 L per mol falls out of PV = nRT at the old-IUPAC STP point (0 °C, 1 atm) for an ideal gas. The conversion is ordinary unit work that takes a measured gas volume directly into mole-scale stoichiometry, useful any time evolved-gas measurement is the cleanest handle on a reaction.
Formula
Worked Examples
The molar volume of an ideal gas at old-IUPAC STP — the conversion anchor.
Half a mole of evolved gas — the kind of value a small-scale H₂O₂ decomposition lab returns.
About 44.6 mmol — roughly the gas a milliliter-scale evolution reaction sends through the eudiometer.
A scaled-up gas volume — the kind of figure a process-development run handles.