# Arsenic Pentachloride [AsCl5] Molecular Weight Calculation

The molecular weight of Arsenic pentachloride [AsCl5] is 252.185095.

Arsenic pentachloride [AsCl5] is an inorganic compound of two elements: Arsenic and Chlorine. The molecular weight of Arsenic pentachloride is 252.185095 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

# CALCULATION PROCEDURE: Arsenic Pentachloride [AsCl5] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Arsenic pentachloride molecule.
From the chemical formula, you will know different atoms and their number in an Arsenic pentachloride molecule. The chemical formula of Arsenic pentachloride is AsCl5. From the chemical formula, you can find that one molecule of Arsenic pentachloride consists of one Arsenic (As) atom and three Chlorine (Cl) 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 Chlorine (Cl): 35.4527 (Ref: Jlab-ele017)

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

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

Number of Chlorine (Cl) atoms in Arsenic pentachloride: 5
Atomic weight of Chlorine: 35.4527
Total weight of Chlorine atoms in Arsenic pentachloride: 35.4527 x 5 = 177,2635

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

Molecular weight of Arsenic pentachloride: 74.921595 (Arsenic) + 177,2635 (Chlorine) = 252.185095

So the molecular weight of Arsenic pentachloride is 252.185095.

Arsenic pentachloride [AsCl5] Molecular Weight Calculation

## REFERENCES:

• Jlab-ele033: https://education.jlab.org/itselemental/ele033.html
• ciaaw-arsenic: https://www.ciaaw.org/arsenic.htm
• Jlab-ele017: https://education.jlab.org/itselemental/ele017.html

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