Molar Mass of C4H8O4

Molar Mass Calculator

What is the molar mass of C₄H₈O₄?

Answer

M(C₄H₈O₄) =

120.104 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024).

Several substances (isomers) share this composition; their molar mass is the same.

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Ccarbon	4	12.011	48.044 w ≈ 40.00%	≈ 40.00%
Hhydrogen	8	1.0080	8.0640 w ≈ 6.71%	≈ 6.71%
Ooxygen	4	15.999	63.996 w ≈ 53.28%	≈ 53.28%
Σ = 120.104 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

O 53.28%C 40.00%

H 6.71%

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Molar masses of substances nearby

Formula	M, g/mol
FeS₂ (ferrous disulfide)	119.97
NaH₂PO₄ (monosodium phosphate)	119.976
NaHSO₄ (sodium bisulfate)	120.05
C₄H₈O₄	120.104
C₈H₈O (acetophenone)	120.151
MgSO₄ (magnesium sulfate)	120.36
C₄H₁₁NO₃ (tromethamine)	121.136

FAQ

What is the molar mass of C4H8O4?

M(C₄H₈O₄) = 120.104 g/mol

How to calculate the molar mass of C₄H₈O₄?

Add up the atomic weights of all the atoms in the formula: 4 × 12.011 + 8 × 1.0080 + 4 × 15.999 = 120.104 g/mol.

How many grams are in 2 moles of C₄H₈O₄?

m = n × M = 2 mol × 120.104 g/mol = 240.208 g.

See Also