Molar Mass of Sodium iodide
NaI — 149.890 g/mol, worked out element by element.
Molar mass of Sodium iodide, NaI
149.890 g/mol
Molecular weight 149.890 · 2 atoms per formula unit
Also known as: nai.
Thallium-doped crystals of it are the standard gamma-ray scintillation detector.
How 149.890 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Iodine | 1 | 126.9 | 126.900 | 84.66% |
| Sodium | 1 | 22.99 | 22.990 | 15.34% |
| Total | 2 | 149.890 | 100% |
M = 1 × 126.900 + 1 × 22.990 = 149.890 g/mol
Grams to moles for Sodium iodide
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0067 mol | 4.018 × 10^21 |
| 10 g | 0.0667 mol | 4.018 × 10^22 |
| 25 g | 0.1668 mol | 1.004 × 10^23 |
| 50 g | 0.3336 mol | 2.009 × 10^23 |
| 100 g | 0.6672 mol | 4.018 × 10^23 |
| 250 g | 1.6679 mol | 1.004 × 10^24 |
| 149.890 g | 1 mol | 6.022 × 10^23 |
For any other amount, use the molar mass calculator, or the molarity calculator to make up a solution of a given concentration.
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Frequently Asked Questions
What is the molar mass of Sodium iodide?
The molar mass of Sodium iodide (NaI) is 149.890 g/mol. That is the sum of the standard atomic weights of all 2 atoms in one formula unit: 1 × 126.900 + 1 × 22.990 = 149.890.
What is the molecular weight of Sodium iodide?
149.890 — the same number as the molar mass, but as a dimensionless ratio rather than in g/mol. The two terms describe the same arithmetic, so a molecular weight of 149.89 and a molar mass of 149.89 g/mol are the same answer.
How many moles are in 100 g of Sodium iodide?
100 ÷ 149.890 = 0.6672 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Sodium iodide?
By mass, Sodium iodide is 84.66% iodine, 15.34% sodium. Each element's share is its total mass in the formula divided by 149.890.
How many atoms are in one formula unit of Sodium iodide?
2: 1 iodine, 1 sodium. One mole contains 6.02214076 × 10²³ formula units, so a mole of Sodium iodide contains 2 × 6.022 × 10²³ atoms in total.