Molar Mass of SO3 (Sulfur Trioxide)
Molar Mass Calculator
What is the molar mass of SO3?
Answer
M(SO3) ≈
80.06 g/mol
Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — S: 32.06.
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Ssulfur | 1 | 32.06 | 32.06 w ≈ 40.05% | ≈ 40.05% |
| Ooxygen | 3 | 15.999 | 47.997 w ≈ 59.95% | ≈ 59.95% |
| Σ = 80.057 ≈ 80.06 g/mol w = 100% | 100% | |||
Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)
O 59.95%S 40.05%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| TiO₂ (titanium dioxide) | 79.865 |
| Br (bromine) | 79.904 |
| NH₄NO₃ (ammonium nitrate) | 80.043 |
| SO₃ (sulfur trioxide) | 80.06 |
| HBr (hydrogen bromide) | 80.912 |
| H₂Se (hydrogen selenide) | 80.987 |
| ZnO (zinc oxide) | 81.38 |