Molar Mass of KOH (Potassium Hydroxide)
Molar Mass Calculator
What is the molar mass of KOH?
Answer
M(KOH) =
56.105 g/mol
Atomic weights: IUPAC standard values (CIAAW, 2024).
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Kpotassium | 1 | 39.098 | 39.098 w ≈ 69.69% | ≈ 69.69% |
| Ooxygen | 1 | 15.999 | 15.999 w ≈ 28.52% | ≈ 28.52% |
| Hhydrogen | 1 | 1.0080 | 1.0080 w ≈ 1.80% | ≈ 1.80% |
| Σ = 56.105 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)
K 69.69%
O 28.52%H 1.80%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| Mn (manganese) | 54.938 |
| Fe (iron) | 55.845 |
| CaO (calcium oxide) | 56.077 |
| KOH (potassium hydroxide) | 56.105 |
| C₄H₈ (isobutylene) | 56.108 |
| MgS (magnesium sulfide) | 56.37 |
| C₃H₆O (acetone) | 58.080 |