Easily convert between the number of atoms and mass in grams using our online tool. Understand the relationship between these fundamental units with our formula and example conversions.
Formula:
- Atoms to grams: mass (g) = (number of atoms / Avogadro’s constant) * molar mass (g/mol)
- Grams to atoms: number of atoms = (mass (g) / molar mass (g/mol)) * Avogadro’s constant
Where Avogadro’s constant ≈ 6.022 x 1023.
Check Also: Moles ↔ Molecules Calculator
Example Conversions for Water (H₂O, Molar Mass ≈ 18.015 g/mol)
| Atoms of H₂O | Mass (grams) |
|---|---|
| 6.022 x 1023 (1 mol) | 18.015 |
| 1.2044 x 1024 | 36.03 |
| 3.011 x 1023 | 9.0075 |
| 1.8066 x 1024 | 54.045 |
| 6.022 x 1022 | 1.8015 |
Example Conversions for Carbon Dioxide (CO₂, Molar Mass ≈ 44.01 g/mol)
| Atoms of CO₂ | Mass (grams) |
|---|---|
| 6.022 x 1023 (1 mol) | 44.01 |
| 1.2044 x 1024 | 88.02 |
| 3.011 x 1023 | 22.005 |
| 1.8066 x 1024 | 132.03 |
| 6.022 x 1022 | 4.401 |
