Molar Mass of Ammonium nitrate
NH4NO3 — 80.043 g/mol, worked out element by element.
Molar mass of Ammonium nitrate, NH₄NO₃
80.043 g/mol
Molecular weight 80.043 · 9 atoms per formula unit
Also known as: nh4no3.
A high-nitrogen fertiliser whose dissolution is strongly endothermic — the chemistry of instant cold packs.
How 80.043 g/mol is worked out
| Element | Atoms | Atomic mass | Mass | % of total |
|---|---|---|---|---|
| Oxygen | 3 | 15.999 | 47.997 | 59.96% |
| Nitrogen | 2 | 14.007 | 28.014 | 35.00% |
| Hydrogen | 4 | 1.008 | 4.032 | 5.04% |
| Total | 9 | 80.043 | 100% |
M = 3 × 15.999 + 2 × 14.007 + 4 × 1.008 = 80.043 g/mol
Grams to moles for Ammonium nitrate
| Mass | Moles | Formula units |
|---|---|---|
| 1 g | 0.0125 mol | 7.524 × 10^21 |
| 10 g | 0.1249 mol | 7.524 × 10^22 |
| 25 g | 0.3123 mol | 1.881 × 10^23 |
| 50 g | 0.6247 mol | 3.762 × 10^23 |
| 100 g | 1.2493 mol | 7.524 × 10^23 |
| 250 g | 3.1233 mol | 1.881 × 10^24 |
| 80.043 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 Ammonium nitrate?
The molar mass of Ammonium nitrate (NH4NO3) is 80.043 g/mol. That is the sum of the standard atomic weights of all 9 atoms in one formula unit: 3 × 15.999 + 2 × 14.007 + 4 × 1.008 = 80.043.
What is the molecular weight of Ammonium nitrate?
80.043 — 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 80.04 and a molar mass of 80.04 g/mol are the same answer.
How many moles are in 100 g of Ammonium nitrate?
100 ÷ 80.043 = 1.2493 mol. To convert any mass to moles, divide by the molar mass; to go the other way, multiply.
What is the percent composition of Ammonium nitrate?
By mass, Ammonium nitrate is 59.96% oxygen, 35.00% nitrogen, 5.04% hydrogen. Each element's share is its total mass in the formula divided by 80.043.
How many atoms are in one formula unit of Ammonium nitrate?
9: 3 oxygen, 2 nitrogen, 4 hydrogen. One mole contains 6.02214076 × 10²³ formula units, so a mole of Ammonium nitrate contains 9 × 6.022 × 10²³ atoms in total.