Salicylic Acid at a glance
| Property | Value |
|---|
| Molar mass | 138.122 g/mol |
|---|
| Molecular weight | 138.122 u |
|---|
| Chemical formula | C7H6O3 |
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| Monoisotopic mass | 138.031694 u |
|---|
| CAS number | 69-72-7 |
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| PubChem CID | 338 |
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How to calculate the molar mass of salicylic acid
7 × 12.011 + 6 × 1.008 + 3 × 15.999 = 138.122 g/mol
- Count the atoms in C7H6O3: C 7, H 6, O 3.
- Multiply each atom count by the atomic weight of the element.
- Add the results to get 138.122 g/mol.
Elemental composition of salicylic acid
| Element | Atoms | Atomic weight | Mass (g/mol) | Mass % |
|---|
| C Carbon | 7 | 12.011 | 84.077 | 60.872% |
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| H Hydrogen | 6 | 1.008 | 6.048 | 4.3787% |
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| O Oxygen | 3 | 15.999 | 47.997 | 34.75% |
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Grams and moles of salicylic acid
| Amount | Equals |
|---|
| 1 g | 0.00724 mol |
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| 10 g | 0.0724 mol |
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| 100 g | 0.724 mol |
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| 0.1 mol | 13.812 g |
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| 1 mol | 138.12 g |
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| 1 g, in particles | 4.36 × 10^21 |
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Calculate other compounds