The molecular weight of Aluminium iodide [AlI₃] is 407.6949484.

Aluminium iodide [AlI₃] is an inorganic compound of two elements: Aluminium and Iodine. The molecular weight of Aluminium iodide [AlI₃] is 407.6949484 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: Aluminium Iodide [AlI₃] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Aluminium iodide molecule.
From the chemical formula, you will know different atoms and their number in an Aluminium iodide molecule. The chemical formula of Aluminium iodide is AlI₃. From the chemical formula, you can find that one molecule of Aluminium iodide consists of one Aluminium (Al) atom and three Iodine (I) atoms.

Step 2: Find out the atomic weights of each atom (from the periodic table).

Atomic weight of Aluminium (Al): 26.9815384 (Ref: ciaaw-aluminium)
Atomic weight of Iodine (I): 126.90447 (Ref: Jlab-ele053, Ciaaw-iodine, Nist-53)

Step 3: Calculate the molecular weight of Aluminium iodide by adding the total weight of all atoms.

Number of Aluminium (Al) atoms in Aluminium iodide: 1
Atomic weight of Aluminium: 26.9815384
Total weight of Aluminium atoms in Aluminium iodide: 26.9815384 x 1 = 26.9815384

Number of Iodine (I) atoms in Aluminium iodide: 3
Atomic weight of Iodine: 126.90447
Total weight of Iodine atoms in Aluminium iodide: 126.90447 x 3 = 380.71341

Step 4: Calculate the molecular weight of Aluminium iodide by adding up the total weight of all atoms.

Molecular weight of Aluminium iodide: 26.9815384 (Aluminium) + 380.71341 (Iodine) = 407.6949484

So the molecular weight of Aluminium iodide is 407.6949484.

Aluminium Iodide [AlI₃] Molecular Weight Calculation

REFERENCES:

• Ciaaw-aluminium: https://www.ciaaw.org/aluminium.htm
  
• Ciaaw-iodine: https://www.ciaaw.org/iodine.htm
• Nist-53: https://physics.nist.gov/cgi-bin/Elements/elInfo.pl?element=53

See also:

• Hydrogen chloride molecular weight calculation

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