Molar Mass of KNO3 (Potassium Nitrate)
Molar Mass Calculator
What is the molar mass of KNO3?
Answer
M(KNO3) =
101.102 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 ≈ 38.67% | ≈ 38.67% |
| Nnitrogen | 1 | 14.007 | 14.007 w ≈ 13.85% | ≈ 13.85% |
| Ooxygen | 3 | 15.999 | 47.997 w ≈ 47.47% | ≈ 47.47% |
| Σ = 101.102 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 47.47%K 38.67%
N 13.85%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| C₇H₁₆ (n-heptane) | 100.205 |
| HClO₄ (perchloric acid) | 100.45 |
| Ru (ruthenium) | 101.07 |
| KNO₃ (potassium nitrate) | 101.102 |
| C₆H₁₅N (triethylamine) | 101.193 |
| Al₂O₃ (aluminium oxide) | 101.961 |
| C₄H₆O₃ (acetic anhydride) | 102.089 |