Oxygen Gas at a glance
| Property | Value |
|---|
| Molar mass | 31.998 g/mol |
|---|
| Molecular weight | 31.998 u |
|---|
| Chemical formula | O2 |
|---|
| Monoisotopic mass | 31.9898292 u |
|---|
| CAS number | 7782-44-7 |
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| PubChem CID | 977 |
|---|
How to calculate the molar mass of oxygen gas
2 × 15.999 = 31.998 g/mol
- Count the atoms in O2: O 2.
- Multiply each atom count by the atomic weight of the element.
- Add the results to get 31.998 g/mol.
Elemental composition of oxygen gas
| Element | Atoms | Atomic weight | Mass (g/mol) | Mass % |
|---|
| O Oxygen | 2 | 15.999 | 31.998 | 100% |
|---|
Grams and moles of oxygen gas
| Amount | Equals |
|---|
| 1 g | 0.031252 mol |
|---|
| 10 g | 0.31252 mol |
|---|
| 100 g | 3.1252 mol |
|---|
| 0.1 mol | 3.1998 g |
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| 1 mol | 31.998 g |
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| 1 g, in particles | 1.882 × 10^22 |
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Calculate other compounds