Molar Mass of CH2O (Formaldehyde)
Molar Mass Calculator
What is the molar mass of CH2O?
Answer
M(CH2O) =
30.026 g/mol
Atomic weights: IUPAC standard values (CIAAW, 2024).
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Ccarbon | 1 | 12.011 | 12.011 w ≈ 40.00% | ≈ 40.00% |
| Hhydrogen | 2 | 1.0080 | 2.0160 w ≈ 6.71% | ≈ 6.71% |
| Ooxygen | 1 | 15.999 | 15.999 w ≈ 53.28% | ≈ 53.28% |
| Σ = 30.026 g/mol w = 100% | 100% | |||
Each fraction is rounded on its own, so the printed ones add up to 99.99%; unrounded, they make exactly 100%.
Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)
O 53.28%C 40.00%
H 6.71%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| Si (silicon) | 28.085 |
| Li₂O (lithium oxide) | 29.88 |
| NO (nitric oxide) | 30.006 |
| CH₂O (formaldehyde) | 30.026 |
| C₂H₆ (ethane) | 30.070 |
| P (phosphorus) | 30.974 |
| CH₅N (methylamine) | 31.058 |