Molar Mass of CH3NO2 (Nitromethane)

Molar Mass Calculator

What is the molar mass of CH₃NO₂?

Answer

M(CH₃NO₂) =

61.040 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
Ccarbon	1	12.011	12.011 w ≈ 19.68%	≈ 19.68%
Hhydrogen	3	1.0080	3.0240 w ≈ 4.95%	≈ 4.95%
Nnitrogen	1	14.007	14.007 w ≈ 22.95%	≈ 22.95%
Ooxygen	2	15.999	31.998 w ≈ 52.42%	≈ 52.42%
Σ = 61.040 g/mol w = 100%				100%

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

Mass fractions of the elements

O 52.42%

N 22.95%C 19.68%H 4.95%

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Molar masses of substances nearby

Formula	M, g/mol
SiO₂ (silicon dioxide)	60.083
C₃H₇OH (propyl alcohol)	60.096
C₂H₈N₂ (ethylenediamine)	60.100
CH₃NO₂ (nitromethane)	61.040
H₃BO₃ (orthoboric acid)	61.83
Na₂O (sodium oxide)	61.979
H₂CO₃ (carbonic acid)	62.024

FAQ

What is the molar mass of CH3NO2?

M(CH₃NO₂) = 61.040 g/mol

How to calculate the molar mass of CH₃NO₂?

Add up the atomic weights of all the atoms in the formula: 12.011 + 3 × 1.0080 + 14.007 + 2 × 15.999 = 61.040 g/mol.

How many grams are in 2 moles of CH₃NO₂?

m = n × M = 2 mol × 61.040 g/mol = 122.080 g.

See Also