Molar Mass of C5H9NO2 (DL-proline): Step by Step

What is the molar mass of C₅H₉NO₂?

Answer

M(C₅H₉NO₂) =

115.132 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	5	12.011	60.055 w ≈ 52.16%	≈ 52.16%
Hhydrogen	9	1.0080	9.0720 w ≈ 7.88%	≈ 7.88%
Nnitrogen	1	14.007	14.007 w ≈ 12.17%	≈ 12.17%
Ooxygen	2	15.999	31.998 w ≈ 27.79%	≈ 27.79%
Σ = 115.132 g/mol w = 100%				100%

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Formula	M, g/mol
In (indium)	114.82
MnCO₃ (manganese carbonate)	114.946
NH₄H₂PO₄ (monobasic ammonium phosphate)	115.025
C₅H₉NO₂ (DL-proline)	115.132
C₄H₄O₄ (fumaric acid)	116.072
CH₃CH₂CH₂CO₂CH₂CH₃ (ethyl butyrate)	116.160
C₅H₁₁NO₂ (L-valine)	117.148