Molar Mass of Magnesium chloride
MgCl2 — 95.205 g/mol, worked out element by element.
Molar mass of Magnesium chloride, MgCl₂
95.205 g/mol
Molecular weight 95.205 · 3 atoms per formula unit
Also known as: mgcl2.
Extracted from seawater and electrolysed to produce magnesium metal.
How 95.205 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Chlorine | 2 | 35.45 | 70.900 | 74.47% |
| Magnesium | 1 | 24.305 | 24.305 | 25.53% |
| Total | 3 | 95.205 | 100% |
M = 2 × 35.450 + 1 × 24.305 = 95.205 g/mol
Grams to moles for Magnesium chloride
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0105 mol | 6.325 × 10^21 |
| 10 g | 0.1050 mol | 6.325 × 10^22 |
| 25 g | 0.2626 mol | 1.581 × 10^23 |
| 50 g | 0.5252 mol | 3.163 × 10^23 |
| 100 g | 1.0504 mol | 6.325 × 10^23 |
| 250 g | 2.6259 mol | 1.581 × 10^24 |
| 95.205 g | 1 mol | 6.022 × 10^23 |
For any other amount, use the molar mass calculator, or the molarity calculator to make up a solution of a given concentration.
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Frequently Asked Questions
What is the molar mass of Magnesium chloride?
The molar mass of Magnesium chloride (MgCl2) is 95.205 g/mol. That is the sum of the standard atomic weights of all 3 atoms in one formula unit: 2 × 35.450 + 1 × 24.305 = 95.205.
What is the molecular weight of Magnesium chloride?
95.205 — the same number as the molar mass, but as a dimensionless ratio rather than in g/mol. The two terms describe the same arithmetic, so a molecular weight of 95.21 and a molar mass of 95.21 g/mol are the same answer.
How many moles are in 100 g of Magnesium chloride?
100 ÷ 95.205 = 1.0504 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Magnesium chloride?
By mass, Magnesium chloride is 74.47% chlorine, 25.53% magnesium. Each element's share is its total mass in the formula divided by 95.205.
How many atoms are in one formula unit of Magnesium chloride?
3: 2 chlorine, 1 magnesium. One mole contains 6.02214076 × 10²³ formula units, so a mole of Magnesium chloride contains 3 × 6.022 × 10²³ atoms in total.