# Trichloroethylene [C2HCl3] Molecular Weight Calculation

The molecular weight of Trichloroethylene (C2HCl3) is 131.3875. Trichloroethylene (C2HCl3) is an organic compound of three elements: Carbon, Hydrogen, and Chlorine. The molecular weight of Trichloroethylene is 131.3875 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

# CALCULATION PROCEDURE: Trichloroethylene  [C2HCl3] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Trichloroethylene molecule.
You will know different atoms and their number in a Trichloroethylene molecule from the chemical formula. The chemical formula of Trichloroethylene is C2HCl3. From the chemical formula, you can find that one molecule of Trichloroethylene consists of two Carbon (C) atoms, one Hydrogen (H) atom, and three Chlorine atoms.

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

Atomic weight of Carbon (C): 12.0107 (Ref: Jlab-ele006)
Atomic weight of Hydrogen (H): 1.008 (Ref: Lanl-1)
Atomic weight of Chlorine (Cl): 212.7162 (Ref: jlab-ele017)

Step 3: Calculate the total weight of each atom in a Trichloroethylene molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Trichloroethylene: 12
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Trichloroethylene: 12.0107 x 12 = 144.1284

Number of Hydrogen atoms in Trichloroethylene: 8
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Trichloroethylene: 1.008 x 8 = 8.064

Number of Chlorine atoms in Trichloroethylene: 6
Atomic weight of Chlorine (Cl): 35.4527
Total weight of Chlorine atoms in Trichloroethylene: 212.7162 x 6 = 212.7162

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

Molecular weight of Trichloroethylene: 144.1284 (Carbon) + 8.064 (Hydrogen) + 212.7162 (Chlorine) = 131.3875

So the molecular weight of Trichloroethylene is 131.3875.

Trichloroethylene [C2HCl3] Molecular Weight Calculation

## REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml
• Jlab-ele006: https://education.jlab.org/itselemental/ele006.html
• Jlab-ele007: https://education.jlab.org/itselemental/ele007.html
• Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
• Pubchem-Chlorine: https://pubchem.ncbi.nlm.nih.gov/element/Chlorine 