Molar Mass of MgSO4·7H2O (Magnesium Sulfate Heptahydrate)
Molar Mass Calculator
What is the molar mass of MgSO4·7H2O?
Answer
M(MgSO4·7H2O) ≈
246.47 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.
7 H2O — water of crystallization, part of the molar mass: 7 × 18.015 = 126.105.
MgSO4·7H2O = MgSO4 + 7 H2O → Mg 1, S 1, O 11, H 14
| Element | Atoms, n | Atomic weight, A | n × A, g/mol Mass fraction, w | |
|---|---|---|---|---|
| Mgmagnesium | 1 | 24.305 | 24.305 w ≈ 9.86% | ≈ 9.86% |
| Ssulfur | 1 | 32.06 | 32.06 w ≈ 13.01% | ≈ 13.01% |
| Ooxygen | 11 | 15.999 | 175.989 w ≈ 71.40% | ≈ 71.40% |
| Hhydrogen | 14 | 1.0080 | 14.1120 w ≈ 5.73% | ≈ 5.73% |
| Σ = 246.466 ≈ 246.47 g/mol w = 100% | 100% | |||
Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)
O 71.40%
S 13.01%Mg 9.86%H 5.73%
Related Calculations
See Also
- Liters to Kilograms - How many kilograms are in a liter of water, honey, gasoline, sand and other substances — by density
- Grams to Kg - Convert Grams to Kilograms
- Percentage Calculator: Fraction to Percent - What percentage one number is of another? Convert fraction into a percentage
- Scientific Calculator with Memory & History - Free Engineering Calculator Online with Memory Function, Operation History, Logarithms & Trigonometry. Similar to ti-83, ti-84, ti-89
Molar masses of substances nearby
| Formula | M, g/mol |
|---|---|
| Fe(NO₃)₃ (ferric nitrate) | 241.857 |
| BaCl₂·2H₂O (barium chloride dihydrate) | 244.26 |
| C₁₀H₁₆N₂O₃S (biotin) | 244.31 |
| MgSO₄·7H₂O (magnesium sulfate heptahydrate) | 246.47 |
| Ag₂S (silver sulfide) | 247.80 |
| CuSO₄·5H₂O (copper(II) sulfate pentahydrate) | 249.68 |
| (NH₄)₂Cr₂O₇ (ammonium dichromate) | 252.063 |
FAQ
What is the molar mass of MgSO4·7H2O?
M(MgSO₄·7H₂O) ≈ 246.47 g/mol
Is the water counted in MgSO₄·7H₂O?
Yes: the water of crystallization is part of the formula and of the molar mass. 7 H₂O add 7 × 18.015 = 126.105 g/mol; M(MgSO₄·7H₂O) ≈ 246.47 g/mol, while anhydrous M(MgSO₄) ≈ 120.36 g/mol.
How many grams are in 2 moles of MgSO₄·7H₂O?
m = n × M = 2 mol × 246.47 g/mol = 492.94 g.
See Also
- Molar Mass of Mg(OH)2 (Magnesium Hydroxide): Step by Step
- Molar Mass of Mg3(PO4)2 (Magnesium Phosphate): Step by Step
- Molar Mass of MgBr2 (Magnesium Bromide): Step by Step
- Molar Mass of MgCl2 (Magnesium Chloride): Step by Step
- Molar Mass of MgCO3 (Magnesium Carbonate): Step by Step
- Molar Mass of MgF2 (Magnesium Fluoride): Step by Step
- Molar Mass of MgI2 (Magnesium Iodide): Step by Step
- Molar Mass of MgO (Magnesium Oxide): Step by Step
- Molar Mass of MgS (Magnesium Sulfide): Step by Step
- Molar Mass of MgSO4 (Magnesium Sulfate): Step by Step
- Molar Mass of Mn (Manganese): Step by Step
- Molar Mass of Mn(NO3)2 (Manganese Nitrate): Step by Step
- Molar Mass of Mn2O7 (Manganese Heptoxide): Step by Step
- Molar Mass of MnCl2 (Manganese(II) Chloride): Step by Step
- Molar Mass of MnCO3 (Manganese Carbonate): Step by Step
- Molar Mass of MnO (Manganese(II) Oxide): Step by Step
- Molar Mass of MnO2: Step by Step
- Molar Mass of MnSO4 (Manganese(II) Sulfate): Step by Step
- Molar Mass of Mo (Molybdenum): Step by Step
- Molar Mass of MoO3: Step by Step
- Молярная масса MgSO4·7H2O (гептагидрат сульфата магния)
- Masa molar de MgSO4·7H2O: cálculo
- Massa molar de MgSO4·7H2O: cálculo