Cysteine at a glance
| Property | Value |
|---|
| Molar mass | 121.154 g/mol |
|---|
| Molecular weight | 121.154 u |
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| Chemical formula | C3H7NO2S |
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| Monoisotopic mass | 121.01975 u |
|---|
| CAS number | 52-90-4 |
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| PubChem CID | 5862 |
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How to calculate the molar mass of cysteine
3 × 12.011 + 7 × 1.008 + 1 × 14.007 + 2 × 15.999 + 1 × 32.06 = 121.154 g/mol
- Count the atoms in C3H7NO2S: C 3, H 7, N 1, O 2, S 1.
- Multiply each atom count by the atomic weight of the element.
- Add the results to get 121.154 g/mol.
Elemental composition of cysteine
| Element | Atoms | Atomic weight | Mass (g/mol) | Mass % |
|---|
| C Carbon | 3 | 12.011 | 36.033 | 29.741% |
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| H Hydrogen | 7 | 1.008 | 7.056 | 5.824% |
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| N Nitrogen | 1 | 14.007 | 14.007 | 11.561% |
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| O Oxygen | 2 | 15.999 | 31.998 | 26.411% |
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| S Sulfur | 1 | 32.06 | 32.06 | 26.462% |
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Grams and moles of cysteine
| Amount | Equals |
|---|
| 1 g | 0.008254 mol |
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| 10 g | 0.08254 mol |
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| 100 g | 0.8254 mol |
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| 0.1 mol | 12.115 g |
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| 1 mol | 121.15 g |
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| 1 g, in particles | 4.9706 × 10^21 |
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Calculate other compounds