Molar Mass of C3H6O (Acetone)

Molar Mass Calculator

What is the molar mass of C₃H₆O?

Answer

M(C₃H₆O) =

58.080 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 ≈ 62.04%	≈ 62.04%
Hhydrogen	6	1.0080	6.0480 w ≈ 10.41%	≈ 10.41%
Ooxygen	1	15.999	15.999 w ≈ 27.55%	≈ 27.55%
Σ = 58.080 g/mol w = 100%				100%

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

Mass fractions of the elements

C 62.04%

O 27.55%H 10.41%

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Molar masses of substances nearby

Formula	M, g/mol
KOH (potassium hydroxide)	56.105
C₄H₈ (isobutylene)	56.108
MgS (magnesium sulfide)	56.37
C₃H₆O (acetone)	58.080
KF (potassium fluoride)	58.096
C₄H₁₀ (butane)	58.124
Mg(OH)₂ (magnesium hydroxide)	58.319

FAQ

What is the molar mass of C3H6O?

M(C₃H₆O) = 58.080 g/mol

How to calculate the molar mass of C₃H₆O?

Add up the atomic weights of all the atoms in the formula: 3 × 12.011 + 6 × 1.0080 + 15.999 = 58.080 g/mol.

How many grams are in 2 moles of C₃H₆O?

m = n × M = 2 mol × 58.080 g/mol = 116.160 g.

See Also