Alanine [C3H7NO2] Molecular Weight Calculation

The molecular weight of Alanine [C3H7NO2] is 89.09364.

Alanine [C3H7NO2] Molecular Weight CalculationAlanine (C3H7NO2) is an organic compound of four elements: Carbon, Hydrogen, Nitrogen, and Oxygen. The molecular weight of Alanine is 89.09364 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: Alanine  [C3H7NO2] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in an Alanine molecule.
From the chemical formula, you will know different atoms and their number in an Alanine molecule. The chemical formula of Alanine is C3H7NO2. From the chemical formula of Alanine, you can find that one molecule of Alanine consists of three Carbon (C) atoms, seven Hydrogen (H) atoms, one Nitrogen (N) atom, 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 an Alanine molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Alanine: 3
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Alanine: 12.0107 x 3 = 36.0321

Number of Hydrogen atoms in Alanine: 7
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Alanine: 1.008 x 7 = 7.056

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

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

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

Molecular weight of Alanine: 36.0321 (Carbon) + 7.056 (Hydrogen) + 14.00674 (Nitrogen) + 31.9988 (Oxygen) = 89.09364

So the molecular weight of Alanine is 89.09364.

Alanine [C3H7NO2] Molecular Weight Calculation

Molecular weight of Alanine [C3H7NO2]
Constituent atomsNumber of each atom
Atomic weight
Total weight
Carbon (C)
3
12.0107
36.0321
Hydrogen (H)
7
1.008
7.056
Nitrogen (N)114.0067414.00674
Oxygen (O)2
15.999431.9988
Molecular weight of Alanine [C3H7NO2]:
89.09364

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:

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