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Molar massNitric acid
Molar mass of HNO3 (Nitric acid)
The molar mass of HNO3 is 63.01 g/mol.
A strong acid and oxidising agent used to make fertilisers and explosives.
Step-by-step calculation
Add up the atomic masses of every atom in the formula:
1 × 1.008 + 1 × 14.007 + 3 × 15.999 = 63.01 g/mol
| Element | Atoms | Atomic mass (u) | Subtotal (g/mol) | % by mass |
|---|---|---|---|---|
| Hydrogen (H) | 1 | 1.008 | 1.008 | 1.60% |
| Nitrogen (N) | 1 | 14.007 | 14.007 | 22.23% |
| Oxygen (O) | 3 | 15.999 | 47.997 | 76.17% |
| Molar mass of HNO3 | 63.01 g/mol | |||
Moles to grams for HNO3
Multiply the number of moles by 63.01 g/mol to get the mass, and divide a mass by 63.01 g/mol to get the moles.
| Amount (mol) | Mass (g) | Mass (g) | Amount (mol) |
|---|---|---|---|
| 0.1 mol | 6.30 g | 1 g | 0.0159 mol |
| 0.25 mol | 15.75 g | 5 g | 0.0793 mol |
| 0.5 mol | 31.51 g | 10 g | 0.1587 mol |
| 1 mol | 63.01 g | 50 g | 0.7935 mol |
| 2 mol | 126.02 g | 100 g | 1.5870 mol |
| 5 mol | 315.06 g | 500 g | 7.9350 mol |
Frequently asked questions
What is the molar mass of HNO3?
The molar mass of HNO₃ (nitric acid) is 63.01 g/mol, so one mole of nitric acid weighs 63.01 grams.
How do you calculate the molar mass of HNO3?
Multiply each element’s atomic mass by the number of atoms in the formula and add the results: 1 × 1.008 + 1 × 14.007 + 3 × 15.999 = 63.01 g/mol.
What percentage of HNO3 is oxygen?
Oxygen makes up 76.17% of the mass of HNO₃.
How many grams are in one mole of HNO3?
One mole of HNO₃ has a mass of 63.01 grams, and contains 6.022 × 10²³ formula units.