Molar Mass of FeCl3 (Ferric Chloride)

Molar Mass Calculator

What is the molar mass of FeCl₃?

Answer

M(FeCl₃) ≈

162.20 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
Feiron	1	55.845	55.845 w ≈ 34.43%	≈ 34.43%
Clchlorine	3	35.45	106.35 w ≈ 65.57%	≈ 65.57%
Σ = 162.195 ≈ 162.20 g/mol w = 100%				100%

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

Mass fractions of the elements

Cl 65.57%

Fe 34.43%

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Molar masses of substances nearby

Formula	M, g/mol
ZnSO₄ (zinc sulfate)	161.44
Na₂CrO₄ (sodium chromate)	161.972
Ca(HCO₃)₂ (calcium bicarbonate)	162.110
FeCl₃ (ferric chloride)	162.20
C₁₀H₁₄N₂ ((−)-nicotine)	162.236
C₆H₁₀OS₂ (allicin)	162.27
Dy (dysprosium)	162.50

FAQ

What is the molar mass of FeCl3?

M(FeCl₃) ≈ 162.20 g/mol

How to calculate the molar mass of FeCl₃?

Add up the atomic weights of all the atoms in the formula: 55.845 + 3 × 35.45 = 162.195 ≈ 162.20 g/mol.

How many grams are in 2 moles of FeCl₃?

m = n × M = 2 mol × 162.20 g/mol = 324.40 g.

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