Molar Mass of NaOCl (Sodium Hypochlorite)

Molar Mass Calculator

What is the molar mass of NaOCl?

Answer

M(NaOCl) ≈

74.44 g/mol

Atomic weights: IUPAC standard values (CIAAW, 2024); the sum is rounded to the decimal places of the least precise one — Cl: 35.45.

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 ≈ 30.88%	≈ 30.88%
Ooxygen	1	15.999	15.999 w ≈ 21.49%	≈ 21.49%
Clchlorine	1	35.45	35.45 w ≈ 47.62%	≈ 47.62%
Σ = 74.439 ≈ 74.44 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

Cl 47.62%

Na 30.88%O 21.49%

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Molar masses of substances nearby

Formula	M, g/mol
C₃H₆O₂ (propionic acid)	74.079
Ca(OH)₂ (calcium hydroxide)	74.092
CH₃CH₂OCH₂CH₃ (diethyl ether)	74.123
NaOCl (sodium hypochlorite)	74.44
KCl (potassium chloride)	74.55
NiO (nickel(II) oxide)	74.692
As (arsenic)	74.922

FAQ

What is the molar mass of NaOCl?

M(NaOCl) ≈ 74.44 g/mol

How to calculate the molar mass of NaOCl?

Add up the atomic weights of all the atoms in the formula: 22.990 + 15.999 + 35.45 = 74.439 ≈ 74.44 g/mol.

How many grams are in 2 moles of NaOCl?

m = n × M = 2 mol × 74.44 g/mol = 148.88 g.

See Also