Molar Mass of C9H8O4 (Aspirin)

Molar Mass Calculator

What is the molar mass of C₉H₈O₄?

Answer

M(C₉H₈O₄) =

180.159 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	9	12.011	108.099 w ≈ 60.00%	≈ 60.00%
Hhydrogen	8	1.0080	8.0640 w ≈ 4.48%	≈ 4.48%
Ooxygen	4	15.999	63.996 w ≈ 35.52%	≈ 35.52%
Σ = 180.159 g/mol w = 100%				100%

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

Mass fractions of the elements

C 60.00%O 35.52%

H 4.48%

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Molar masses of substances nearby

Formula	M, g/mol
Hf (hafnium)	178.49
Mn(NO₃)₂ (manganese nitrate)	178.946
C₆H₁₂O₆ (glucose)	180.156
C₉H₈O₄ (aspirin)	180.159
Ta (tantalum)	180.95
(CH₃COO)₂Cu (copper(II) acetate)	181.634
V₂O₅ (vanadium(V) oxide)	181.879

FAQ

What is the molar mass of C9H8O4?

M(C₉H₈O₄) = 180.159 g/mol

How to calculate the molar mass of C₉H₈O₄?

Add up the atomic weights of all the atoms in the formula: 9 × 12.011 + 8 × 1.0080 + 4 × 15.999 = 180.159 g/mol.

How many grams are in 2 moles of C₉H₈O₄?

m = n × M = 2 mol × 180.159 g/mol = 360.318 g.

See Also