Molar Mass of NO2 (Nitrogen Dioxide)

Molar Mass Calculator

What is the molar mass of NO₂?

Answer

M(NO₂) =

46.005 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
Nnitrogen	1	14.007	14.007 w ≈ 30.45%	≈ 30.45%
Ooxygen	2	15.999	31.998 w ≈ 69.55%	≈ 69.55%
Σ = 46.005 g/mol w = 100%				100%

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

Mass fractions of the elements

O 69.55%

N 30.45%

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Molar masses of substances nearby

Formula	M, g/mol
C₃H₈ (propane)	44.097
Sc (scandium)	44.956
C₂H₇N (ethylamine)	45.085
NO₂ (nitrogen dioxide)	46.005
HCOOH (formic acid)	46.025
C₂H₅OH (ethanol)	46.069
CH₆N₂ (monomethylhydrazine)	46.073

FAQ

What is the molar mass of NO2?

M(NO₂) = 46.005 g/mol

How to calculate the molar mass of NO₂?

Add up the atomic weights of all the atoms in the formula: 14.007 + 2 × 15.999 = 46.005 g/mol.

How many grams are in 2 moles of NO₂?

m = n × M = 2 mol × 46.005 g/mol = 92.010 g.

See Also