Molar Mass of C7H8O2 (Guaiacol)
Molar Mass Calculator
What is the molar mass of C7H8O2?
Answer
M(C7H8O2) =
124.139 g/mol
Atomic weights: IUPAC standard values (CIAAW, 2024).
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Ccarbon | 7 | 12.011 | 84.077 w ≈ 67.73% | ≈ 67.73% |
| Hhydrogen | 8 | 1.0080 | 8.0640 w ≈ 6.50% | ≈ 6.50% |
| Ooxygen | 2 | 15.999 | 31.998 w ≈ 25.78% | ≈ 25.78% |
| Σ = 124.139 g/mol w = 100% | 100% | |||
Each fraction is rounded on its own, so the printed ones add up to 100.01%; unrounded, they make exactly 100%.
Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)
C 67.73%
O 25.78%H 6.50%
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