Molar Mass of AlCl3 (Aluminum Chloride)

Molar Mass Calculator

What is the molar mass of AlCl₃?

Answer

M(AlCl₃) ≈

133.33 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
Alaluminium	1	26.982	26.982 w ≈ 20.24%	≈ 20.24%
Clchlorine	3	35.45	106.35 w ≈ 79.76%	≈ 79.76%
Σ = 133.332 ≈ 133.33 g/mol w = 100%				100%

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

Mass fractions of the elements

Cl 79.76%

Al 20.24%

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Molar masses of substances nearby

Formula	M, g/mol
(NH₄)₂HPO₄ (dibasic ammonium phosphate)	132.056
(NH₄)₂SO₄ (ammonium sulfate)	132.13
Cs (caesium)	132.91
AlCl₃ (aluminum chloride)	133.33
LiI (lithium iodide)	133.84
Na₂C₂O₄	133.998
C₄H₆O₅ (DL-malic acid)	134.087

FAQ

What is the molar mass of AlCl3?

M(AlCl₃) ≈ 133.33 g/mol

How to calculate the molar mass of AlCl₃?

Add up the atomic weights of all the atoms in the formula: 26.982 + 3 × 35.45 = 133.332 ≈ 133.33 g/mol.

How many grams are in 2 moles of AlCl₃?

m = n × M = 2 mol × 133.33 g/mol = 266.66 g.

See Also