Molar Mass of Mg(OH)2 (Magnesium Hydroxide)
Molar Mass Calculator
What is the molar mass of Mg(OH)2?
Answer
M(Mg(OH)2) =
58.319 g/mol
Atomic weights: IUPAC standard values (CIAAW, 2024).
Mg(OH)2 = Mg + 2 × (O + H) → Mg 1, O 2, H 2
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Mgmagnesium | 1 | 24.305 | 24.305 w ≈ 41.68% | ≈ 41.68% |
| Ooxygen | 2 | 15.999 | 31.998 w ≈ 54.87% | ≈ 54.87% |
| Hhydrogen | 2 | 1.0080 | 2.0160 w ≈ 3.46% | ≈ 3.46% |
| Σ = 58.319 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)
O 54.87%Mg 41.68%
H 3.46%
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Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| C₃H₆O (acetone) | 58.080 |
| KF (potassium fluoride) | 58.096 |
| C₄H₁₀ (butane) | 58.124 |
| Mg(OH)₂ (magnesium hydroxide) | 58.319 |
| NaCl (sodium chloride) | 58.44 |
| Ni (nickel) | 58.693 |
| Co (cobalt) | 58.933 |