Molar Mass of P2O5 (Phosphorus Pentoxide)
Molar Mass Calculator
What is the molar mass of P2O5?
Answer
M(P2O5) =
141.943 g/mol
Atomic weights: IUPAC standard values (CIAAW, 2024).
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Pphosphorus | 2 | 30.974 | 61.948 w ≈ 43.64% | ≈ 43.64% |
| Ooxygen | 5 | 15.999 | 79.995 w ≈ 56.36% | ≈ 56.36% |
| Σ = 141.943 g/mol w = 100% | 100% | |||
Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)
O 56.36%P 43.64%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| Pr (praseodymium) | 140.91 |
| NaMnO₄ (sodium permanganate) | 141.924 |
| AsH₃O₄ (arsenic acid) | 141.942 |
| P₂O₅ (phosphorus pentoxide) | 141.943 |
| Na₂HPO₄ (dibasic sodium phosphate) | 141.958 |
| Na₂SO₄ (sodium sulfate) | 142.04 |
| C₁₀H₂₂ (decane) | 142.286 |