# Arsenic Tribromide [AsBr3] Molecular Weight Calculation

The molecular weight of Arsenic tribromide [AsBr3] is 314.633595.

Arsenic tribromide [AsBr3] is an inorganic compound of two elements: Arsenic and Bromine. The molecular weight of Arsenic tribromide is 314.633595 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

# CALCULATION PROCEDURE: Arsenic Tribromide [AsBr3] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Arsenic tribromide molecule.
From the chemical formula, you will know different atoms and their number in an Arsenic tribromide molecule. The chemical formula of Arsenic tribromide is AsBr3. From the chemical formula, you can find that one molecule of Arsenic tribromide consists of one Arsenic (As) atom and three Bromine (Br) atoms.

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

Atomic weight of Arsenic (As): 74.921595 (Ref: Jlab-ele033, ciaaw-arsenic)
Atomic weight of Bromine (Br): 79.904 (Ref: Jlab-ele035)

Step 3: Calculate the molecular weight of Arsenic tribromide by adding the total weight of all atoms.

Number of Arsenic atoms in Arsenic tribromide: 1
Atomic weight of Arsenic: 74.921595
Total weight of Arsenic atoms in Arsenic tribromide: 74.921595 x 1 = 74.921595

Number of Bromine (Br) atoms in Arsenic tribromide: 3
Atomic weight of Bromine: 79.904
Total weight of Bromine atoms in Arsenic tribromide: 79.904 x 3 = 239.712

Step 4: Calculate the molecular weight of Arsenic tribromide by adding up the total weight of all atoms.

Molecular weight of Arsenic tribromide: 74.921595 (Arsenic) + 239.712 (Bromine) = 314.633595

So the molecular weight of Arsenic tribromide is 314.633595.

Arsenic tribromide [AsBr3] Molecular Weight Calculation

## REFERENCES:

• Jlab-ele033: https://education.jlab.org/itselemental/ele033.html
• ciaaw-arsenic: https://www.ciaaw.org/arsenic.htm
• Jlab-ele035: https://education.jlab.org/itselemental/ele035.html

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