Molar Mass of HNO3 (Nitric Acid)

Molar Mass Calculator

What is the molar mass of HNO₃?

Answer

M(HNO₃) =

63.012 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Hhydrogen	1	1.0080	1.0080 w ≈ 1.60%	≈ 1.60%
Nnitrogen	1	14.007	14.007 w ≈ 22.23%	≈ 22.23%
Ooxygen	3	15.999	47.997 w ≈ 76.17%	≈ 76.17%
Σ = 63.012 g/mol w = 100%				100%

Atomic weights: CIAAW, Abridged Standard Atomic Weights (2024)

Mass fractions of the elements

O 76.17%

N 22.23%H 1.60%

Related Calculations

See Also

Liters to Kilograms - How many kilograms are in a liter of water, honey, gasoline, sand and other substances — by density
Grams to Kg - Convert Grams to Kilograms
Percentage Calculator: Fraction to Percent - What percentage one number is of another? Convert fraction into a percentage
Scientific Calculator with Memory & History - Free Engineering Calculator Online with Memory Function, Operation History, Logarithms & Trigonometry. Similar to ti-83, ti-84, ti-89

Recalculate with different values ↑

Molar masses of substances nearby

Formula	M, g/mol
C₂H₆O₂ (ethylene glycol)	62.068
MgF₂ (magnesium fluoride)	62.301
C₂H₃Cl (vinyl chloride)	62.50
HNO₃ (nitric acid)	63.012
Cu (copper)	63.546
SO₂ (sulfur dioxide)	64.06
CaC₂ (calcium carbide)	64.100

FAQ

What is the molar mass of HNO3?

M(HNO₃) = 63.012 g/mol

How to calculate the molar mass of HNO₃?

Add up the atomic weights of all the atoms in the formula: 1.0080 + 14.007 + 3 × 15.999 = 63.012 g/mol.

How many grams are in 2 moles of HNO₃?

m = n × M = 2 mol × 63.012 g/mol = 126.024 g.

See Also