Molar Mass of H2CO3 (Carbonic Acid)

Molar Mass Calculator

What is the molar mass of H₂CO₃?

Answer

M(H₂CO₃) =

62.024 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	2	1.0080	2.0160 w ≈ 3.25%	≈ 3.25%
Ccarbon	1	12.011	12.011 w ≈ 19.37%	≈ 19.37%
Ooxygen	3	15.999	47.997 w ≈ 77.38%	≈ 77.38%
Σ = 62.024 g/mol w = 100%				100%

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

Mass fractions of the elements

O 77.38%

C 19.37%H 3.25%

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Molar masses of substances nearby

Formula	M, g/mol
CH₃NO₂ (nitromethane)	61.040
H₃BO₃ (orthoboric acid)	61.83
Na₂O (sodium oxide)	61.979
H₂CO₃ (carbonic acid)	62.024
C₂H₆O₂ (ethylene glycol)	62.068
MgF₂ (magnesium fluoride)	62.301
C₂H₃Cl (vinyl chloride)	62.50

FAQ

What is the molar mass of H2CO3?

M(H₂CO₃) = 62.024 g/mol

How to calculate the molar mass of H₂CO₃?

Add up the atomic weights of all the atoms in the formula: 2 × 1.0080 + 12.011 + 3 × 15.999 = 62.024 g/mol.

How many grams are in 2 moles of H₂CO₃?

m = n × M = 2 mol × 62.024 g/mol = 124.048 g.

See Also