Molar Mass of C6H5COOH (Benzoic Acid)

Molar Mass Calculator

What is the molar mass of C₆H₅COOH?

Answer

M(C₆H₅COOH) =

122.123 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	7	12.011	84.077 w ≈ 68.85%	≈ 68.85%
Hhydrogen	6	1.0080	6.0480 w ≈ 4.95%	≈ 4.95%
Ooxygen	2	15.999	31.998 w ≈ 26.20%	≈ 26.20%
Σ = 122.123 g/mol w = 100%				100%

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

Mass fractions of the elements

C 68.85%

O 26.20%H 4.95%

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Molar masses of substances nearby

Formula	M, g/mol
Sr(OH)₂ (strontium hydroxide)	121.63
Sb (antimony)	121.76
Na₂SiO₃ (sodium metasilicate)	122.062
C₆H₅COOH (benzoic acid)	122.123
NaClO₄ (sodium perchlorate)	122.44
KClO₃	122.55
C₆H₅NO₂ (nitrobenzene)	123.111

FAQ

What is the molar mass of C6H5COOH?

M(C₆H₅COOH) = 122.123 g/mol

How to calculate the molar mass of C₆H₅COOH?

Add up the atomic weights of all the atoms in the formula: 7 × 12.011 + 6 × 1.0080 + 2 × 15.999 = 122.123 g/mol.

How many grams are in 2 moles of C₆H₅COOH?

m = n × M = 2 mol × 122.123 g/mol = 244.246 g.

See Also