Molar Mass of (NH4)2SO4 (Ammonium Sulfate)
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What is the molar mass of (NH4)2SO4?
Answer
M((NH4)2SO4) ≈
132.13 g/mol
Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — S: 32.06.
(NH4)2SO4 = 2 × (N + 4 H) + S + 4 O → N 2, H 8, S 1, O 4
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Nnitrogen | 2 | 14.007 | 28.014 w ≈ 21.20% | ≈ 21.20% |
| Hhydrogen | 8 | 1.0080 | 8.0640 w ≈ 6.10% | ≈ 6.10% |
| Ssulfur | 1 | 32.06 | 32.06 w ≈ 24.26% | ≈ 24.26% |
| Ooxygen | 4 | 15.999 | 63.996 w ≈ 48.43% | ≈ 48.43% |
| Σ = 132.134 ≈ 132.13 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 48.43%
S 24.26%N 21.20%H 6.10%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| C₆H₁₀O₃ (ethyl acetoacetate) | 130.143 |
| Xe (xenon) | 131.29 |
| (NH₄)₂HPO₄ (dibasic ammonium phosphate) | 132.056 |
| (NH₄)₂SO₄ (ammonium sulfate) | 132.13 |
| Cs (caesium) | 132.91 |
| AlCl₃ (aluminum chloride) | 133.33 |
| LiI (lithium iodide) | 133.84 |