Molar Mass of K2Cr2O7 (Potassium Dichromate)
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What is the molar mass of K2Cr2O7?
Answer
M(K2Cr2O7) =
294.181 g/mol
Atomic weights: IUPAC standard values (CIAAW, 2024).
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Kpotassium | 2 | 39.098 | 78.196 w ≈ 26.58% | ≈ 26.58% |
| Crchromium | 2 | 51.996 | 103.992 w ≈ 35.35% | ≈ 35.35% |
| Ooxygen | 7 | 15.999 | 111.993 w ≈ 38.07% | ≈ 38.07% |
| Σ = 294.181 g/mol w = 100% | 100% | |||
Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)
O 38.07%Cr 35.35%
K 26.58%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| CaWO₄ (calcium tungstate) | 287.91 |
| C₁₂H₂₅NaO₄S (sodium lauryl sulfate) | 288.38 |
| CaI₂ (calcium iodide) | 293.88 |
| K₂Cr₂O₇ (potassium dichromate) | 294.181 |
| HgSO₄ (mercuric sulfate) | 296.65 |
| BaBr₂ (barium bromide) | 297.14 |
| SbCl₅ (antimony pentachloride) | 299.01 |