Borax at a glance
| Property | Value |
|---|
| Molar mass | 381.363 g/mol |
|---|
| Molecular weight | 381.363 u |
|---|
| Chemical formula | Na2B4O7·10H2O |
|---|
| Monoisotopic mass | 382.086809 u |
|---|
| CAS number | 1303-96-4 |
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| PubChem CID | 16211214 |
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How to calculate the molar mass of borax
2 × 22.99 + 4 × 10.81 + 17 × 15.999 + 20 × 1.008 = 381.363 g/mol
- Count the atoms in Na2B4O7·10H2O: Na 2, B 4, O 17, H 20.
- Multiply each atom count by the atomic weight of the element.
- Add the results to get 381.363 g/mol.
Elemental composition of borax
| Element | Atoms | Atomic weight | Mass (g/mol) | Mass % |
|---|
| Na Sodium | 2 | 22.99 | 45.98 | 12.057% |
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| B Boron | 4 | 10.81 | 43.24 | 11.338% |
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| O Oxygen | 17 | 15.999 | 271.983 | 71.319% |
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| H Hydrogen | 20 | 1.008 | 20.16 | 5.2863% |
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Grams and moles of borax
| Amount | Equals |
|---|
| 1 g | 0.0026222 mol |
|---|
| 10 g | 0.026222 mol |
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| 100 g | 0.26222 mol |
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| 0.1 mol | 38.136 g |
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| 1 mol | 381.36 g |
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| 1 g, in particles | 1.5791 × 10^21 |
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Calculate other compounds