Molar Mass of HC3H5O3 (DL-lactic Acid)

Molar Mass Calculator

What is the molar mass of HC₃H₅O₃?

Answer

M(HC₃H₅O₃) =

90.078 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
Hhydrogen	6	1.0080	6.0480 w ≈ 6.71%	≈ 6.71%
Ccarbon	3	12.011	36.033 w ≈ 40.00%	≈ 40.00%
Ooxygen	3	15.999	47.997 w ≈ 53.28%	≈ 53.28%
Σ = 90.078 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
C₃H₇NO₂ (L-alanine)	89.094
Fe(OH)₂ (ferrous hydroxide)	89.859
H₂C₂O₄ (oxalic acid)	90.034
HC₃H₅O₃ (DL-lactic acid)	90.078
NaClO₂ (sodium chlorite)	90.44
NiS (nickel(II) sulfide)	90.75
Zr (zirconium)	91.222

FAQ

What is the molar mass of HC3H5O3?

M(HC₃H₅O₃) = 90.078 g/mol

How to calculate the molar mass of HC₃H₅O₃?

Add up the atomic weights of all the atoms in the formula: 6 × 1.0080 + 3 × 12.011 + 3 × 15.999 = 90.078 g/mol.

How many grams are in 2 moles of HC₃H₅O₃?

m = n × M = 2 mol × 90.078 g/mol = 180.156 g.

See Also