Molar Mass of C3H6O2 (Propionic Acid)

Molar Mass Calculator

What is the molar mass of C₃H₆O₂?

Answer

M(C₃H₆O₂) =

74.079 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	3	12.011	36.033 w ≈ 48.64%	≈ 48.64%
Hhydrogen	6	1.0080	6.0480 w ≈ 8.16%	≈ 8.16%
Ooxygen	2	15.999	31.998 w ≈ 43.19%	≈ 43.19%
Σ = 74.079 g/mol w = 100%				100%

Each fraction is rounded on its own, so the printed ones add up to 99.99%; unrounded, they make exactly 100%.

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

Mass fractions of the elements

C 48.64%O 43.19%

H 8.16%

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Molar masses of substances nearby

Formula	M, g/mol
Ge (germanium)	72.630
C₄H₁₁N (diethylamine)	73.139
Li₂CO₃ (lithium carbonate)	73.89
C₃H₆O₂ (propionic acid)	74.079
Ca(OH)₂ (calcium hydroxide)	74.092
CH₃CH₂OCH₂CH₃ (diethyl ether)	74.123
NaOCl (sodium hypochlorite)	74.44

FAQ

What is the molar mass of C3H6O2?

M(C₃H₆O₂) = 74.079 g/mol

How to calculate the molar mass of C₃H₆O₂?

Add up the atomic weights of all the atoms in the formula: 3 × 12.011 + 6 × 1.0080 + 2 × 15.999 = 74.079 g/mol.

How many grams are in 2 moles of C₃H₆O₂?

m = n × M = 2 mol × 74.079 g/mol = 148.158 g.

See Also