The molecular weight of Threonine [C₄H₉NO₃] is 119.11974.

Threonine (C₄H₉NO₃) is an organic compound of four elements: Carbon, Hydrogen, Nitrogen, and Oxygen. The molecular weight of Threonine is 119.11974 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: Threonine  [C₄H₉NO₃] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Threonine molecule.
From the chemical formula, you will know different atoms and their number in a Threonine molecule. The chemical formula of Threonine is C₄H₉NO₃. From the chemical formula of Threonine, you can find that one molecule of Threonine consists of four Carbon (C) atoms, nine Hydrogen (H) atoms, one Nitrogen (N) atom, and three 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 Threonine molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Threonine: 4
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Threonine: 12.0107 x 4 = 48.0428

Number of Hydrogen atoms in Threonine: 9
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Threonine: 1.008 x 9 = 9.072

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

Number of Oxygen atoms in Threonine: 3
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in Threonine: 15.9994 x 3 = 47.9982

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

Molecular weight of Threonine: 48.0428 (Carbon) + 9.072 (Hydrogen) + 14.00674 (Nitrogen) + 47.9982 (Oxygen) = 119.11974

So the molecular weight of Threonine is 119.11974.

Threonine [C₄H₉NO₃] 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
  

See also:

• Hydrogen chloride molecular weight calculation