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Molar massAmmonia
Molar mass of NH3 (Ammonia)
The molar mass of NH3 is 17.03 g/mol.
A pungent alkaline gas used to make fertilisers; turns damp red litmus blue.
Step-by-step calculation
Add up the atomic masses of every atom in the formula:
1 × 14.007 + 3 × 1.008 = 17.03 g/mol
| Element | Atoms | Atomic mass (u) | Subtotal (g/mol) | % by mass |
|---|---|---|---|---|
| Nitrogen (N) | 1 | 14.007 | 14.007 | 82.24% |
| Hydrogen (H) | 3 | 1.008 | 3.024 | 17.76% |
| Molar mass of NH3 | 17.03 g/mol | |||
Moles to grams for NH3
Multiply the number of moles by 17.03 g/mol to get the mass, and divide a mass by 17.03 g/mol to get the moles.
| Amount (mol) | Mass (g) | Mass (g) | Amount (mol) |
|---|---|---|---|
| 0.1 mol | 1.70 g | 1 g | 0.0587 mol |
| 0.25 mol | 4.26 g | 5 g | 0.2936 mol |
| 0.5 mol | 8.52 g | 10 g | 0.5872 mol |
| 1 mol | 17.03 g | 50 g | 2.9358 mol |
| 2 mol | 34.06 g | 100 g | 5.8716 mol |
| 5 mol | 85.16 g | 500 g | 29.3582 mol |
Experiments that use ammonia
⚖️ Calculate any other formulaFrequently asked questions
What is the molar mass of NH3?
The molar mass of NH₃ (ammonia) is 17.03 g/mol, so one mole of ammonia weighs 17.03 grams.
How do you calculate the molar mass of NH3?
Multiply each element’s atomic mass by the number of atoms in the formula and add the results: 1 × 14.007 + 3 × 1.008 = 17.03 g/mol.
What percentage of NH3 is nitrogen?
Nitrogen makes up 82.24% of the mass of NH₃.
How many grams are in one mole of NH3?
One mole of NH₃ has a mass of 17.03 grams, and contains 6.022 × 10²³ formula units.