Helium at a glance
| Property | Value |
|---|
| Molar mass | 4.0026 g/mol |
|---|
| Molecular weight | 4.0026 u |
|---|
| Chemical formula | He |
|---|
| CAS number | 7440-59-7 |
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| PubChem CID | 23987 |
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How to calculate the molar mass of helium
1 × 4.0026 = 4.0026 g/mol
- Count the atoms in He: He 1.
- Multiply each atom count by the atomic weight of the element.
- Add the results to get 4.0026 g/mol.
Elemental composition of helium
| Element | Atoms | Atomic weight | Mass (g/mol) | Mass % |
|---|
| He Helium | 1 | 4.0026 | 4.0026 | 100% |
|---|
Grams and moles of helium
| Amount | Equals |
|---|
| 1 g | 0.24984 mol |
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| 10 g | 2.4984 mol |
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| 100 g | 24.984 mol |
|---|
| 0.1 mol | 0.40026 g |
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| 1 mol | 4.0026 g |
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| 1 g, in particles | 1.5046 × 10^23 |
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Calculate other compounds