# Acetonitrile [CH3CN] Molecular Weight Calculation

The molecular weight of Acetonitrile (CH3CN) is 41.05214.

Acetonitrile (CH3CN) is an organic compound of three elements: Carbon, Hydrogen, and Nitrogen. The molecular weight of Acetonitrile is 41.05214 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

# CALCULATION PROCEDURE: Acetonitrile  [CH3CN] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Acetonitrile molecule.
You will know different atoms and their number in an Acetonitrile molecule from the chemical formula. The chemical formula of Acetonitrile is CH3CN. From the chemical formula, you can find that one molecule of Acetonitrile consists of two Carbon (C) atoms, three Hydrogen (H) atoms, and one Nitrogen (N) atom.

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 Nitrogen (N): 14.00674 (Ref: Jlab-ele007)

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

Number of Carbon atoms in Acetonitrile: 2
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Acetonitrile: 12.0107 x 2 = 24.0214

Number of Hydrogen atoms in Acetonitrile: 3
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Acetonitrile: 1.008 x 3 = 3.024

Number of Nitrogen atoms in Acetonitrile: 1
Atomic weight of Nitrogen (N): 14.00674
Total weight of Nitrogen atoms in Acetonitrile: 14.00674 x 1 = 14.00674

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

Molecular weight of Acetonitrile: 24.0214 (Carbon) + 3.024 (Hydrogen) + 14.00674 (Nitrogen) = 41.05214

So the molecular weight of Acetonitrile is 41.05214.

Acetonitrile [CH3CN] 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