Molar Mass of CH3COH (Acetaldehyde)

Molar Mass Calculator

What is the molar mass of CH₃COH?

Answer

M(CH₃COH) =

44.053 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	2	12.011	24.022 w ≈ 54.53%	≈ 54.53%
Hhydrogen	4	1.0080	4.0320 w ≈ 9.15%	≈ 9.15%
Ooxygen	1	15.999	15.999 w ≈ 36.32%	≈ 36.32%
Σ = 44.053 g/mol w = 100%				100%

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

Mass fractions of the elements

C 54.53%O 36.32%

H 9.15%

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Molar masses of substances nearby

Formula	M, g/mol
HN₃ (hydrogen azide)	43.029
CO₂ (carbon dioxide)	44.009
N₂O (nitrous oxide)	44.013
CH₃COH (acetaldehyde)	44.053
C₃H₈ (propane)	44.097
Sc (scandium)	44.956
C₂H₇N (ethylamine)	45.085

FAQ

What is the molar mass of CH3COH?

M(CH₃COH) = 44.053 g/mol

How to calculate the molar mass of CH₃COH?

Add up the atomic weights of all the atoms in the formula: 2 × 12.011 + 4 × 1.0080 + 15.999 = 44.053 g/mol.

How many grams are in 2 moles of CH₃COH?

m = n × M = 2 mol × 44.053 g/mol = 88.106 g.

See Also