# Tryptophan [C11H12N2O2] Molecular Weight Calculation

The molecular weight of Tryptophan [C11H12N2O2] is 204.22598. Tryptophan (C11H12N2O2) is an organic compound of four elements: Carbon, Hydrogen, Nitrogen, and Oxygen. The molecular weight of Tryptophan is 204.22598 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

# CALCULATION PROCEDURE: Tryptophan  [C11H12N2O2] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Tryptophan molecule.
From the chemical formula, you will know different atoms and their number in a Tryptophan molecule. The chemical formula of Tryptophan is C11H12N2O2. From the chemical formula of Tryptophan, you can find that one molecule of Tryptophan consists of eleven Carbon (C) atoms, twelve Hydrogen (H) atoms, two Nitrogen (N) atoms, and two Oxygen 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 Nitrogen (N): 14.00674 (Ref: Jlab-ele007)
Atomic weight of Oxygen (O): 15.9994 (Ref: Jlab-ele008)

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

Number of Carbon atoms in Tryptophan: 11
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Tryptophan 12.0107 x 11 = 132.1177

Number of Hydrogen atoms in Tryptophan: 12
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Tryptophan: 1.008 x 12 = 12.096

Number of Nitrogen atoms in Tryptophan: 2
Atomic weight of Nitrogen (N): 14.00674
Total weight of Nitrogen atoms in Tryptophan: 14.00674 x 2 = 28.01348

Number of Oxygen atoms in Tryptophan: 2
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in Tryptophan: 15.9994 x 2 = 31.9988

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

Molecular weight of Tryptophan: 132.1177 (Carbon) + 12.096 (Hydrogen) + 28.01348 (Nitrogen) + 31.9988 (Oxygen) = 204.22598

So the molecular weight of Tryptophan is 204.22598.

Tryptophan [C11H12N2O2] 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 