Molar Mass of NaHSO3 (Sodium Hydrogen Sulfite)

Molar Mass Calculator

What is the molar mass of NaHSO₃?

Answer

M(NaHSO₃) ≈

104.06 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — S: 32.06.

Contribution of each element
Element	Atoms, n	Atomic weight, A	n × A, g/mol Mass fraction, w	Mass fraction, w
Nasodium	1	22.990	22.990 w ≈ 22.09%	≈ 22.09%
Hhydrogen	1	1.0080	1.0080 w ≈ 0.97%	≈ 0.97%
Ssulfur	1	32.06	32.06 w ≈ 30.81%	≈ 30.81%
Ooxygen	3	15.999	47.997 w ≈ 46.13%	≈ 46.13%
Σ = 104.055 ≈ 104.06 g/mol w = 100%				100%

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

Mass fractions of the elements

O 46.13%

S 30.81%Na 22.09%H 0.97%

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Molar masses of substances nearby

Formula	M, g/mol
Cr(OH)₃	103.017
ZnF₂ (zinc fluoride)	103.38
SrO (strontium oxide)	103.62
NaHSO₃ (sodium hydrogen sulfite)	104.06
C₃H₄O₄ (malonic acid)	104.061
C₈H₈ (styrene)	104.152
BeSO₄ (beryllium sulfate)	105.07

FAQ

What is the molar mass of NaHSO3?

M(NaHSO₃) ≈ 104.06 g/mol

How to calculate the molar mass of NaHSO₃?

Add up the atomic weights of all the atoms in the formula: 22.990 + 1.0080 + 32.06 + 3 × 15.999 = 104.055 ≈ 104.06 g/mol.

How many grams are in 2 moles of NaHSO₃?

m = n × M = 2 mol × 104.06 g/mol = 208.12 g.

See Also