Fluorescein at a glance
| Property | Value |
|---|
| Molar mass | 332.311 g/mol |
|---|
| Molecular weight | 332.311 u |
|---|
| Chemical formula | C20H12O5 |
|---|
| Monoisotopic mass | 332.068473 u |
|---|
| CAS number | 2321-07-5 |
|---|
| PubChem CID | 16850 |
|---|
How to calculate the molar mass of fluorescein
20 × 12.011 + 12 × 1.008 + 5 × 15.999 = 332.311 g/mol
- Count the atoms in C20H12O5: C 20, H 12, O 5.
- Multiply each atom count by the atomic weight of the element.
- Add the results to get 332.311 g/mol.
Elemental composition of fluorescein
| Element | Atoms | Atomic weight | Mass (g/mol) | Mass % |
|---|
| C Carbon | 20 | 12.011 | 240.22 | 72.288% |
|---|
| H Hydrogen | 12 | 1.008 | 12.096 | 3.64% |
|---|
| O Oxygen | 5 | 15.999 | 79.995 | 24.072% |
|---|
Grams and moles of fluorescein
| Amount | Equals |
|---|
| 1 g | 0.0030092 mol |
|---|
| 10 g | 0.030092 mol |
|---|
| 100 g | 0.30092 mol |
|---|
| 0.1 mol | 33.231 g |
|---|
| 1 mol | 332.31 g |
|---|
| 1 g, in particles | 1.8122 × 10^21 |
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