1,2-Butanediol [CH3CH2CH(OH)CH2OH] Molecular Weight Calculation

The molecular weight of 1,2-Butanediol [CH3CH2CH(OH)CH2OH] is 90.1216.

1,2-Butanediol [CH3CH2CH(OH)CH2OH] Molecular Weight Calculation1,2-Butanediol [CH3CH2CH(OH)CH2OH] is an organic compound of three elements: Carbon, Hydrogen, and Oxygen. The molecular weight of 1,2-Butanediol is 90.1216 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: 1,2-Butanediol [CH3CH2CH(OH)CH2OH] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a 1,2-Butanediol molecule.
You will know different atoms and their number in a 1,2-Butanediol from the chemical formula. The chemical formula of 1,2-Butanediol is C4H10O2. From the chemical formula, you can find that one molecule of 1,2-Butanediol has four Carbon (C) atoms, ten Hydrogen (H) atoms and two Oxygen (O) atoms.

Step 2: Find out atomic weights of each atom (from 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 Oxygen (O): 15.9994 (Ref: Jlab-ele008)

Step 3: Calculate the total weight of each atom present in a 1,2-Butanediol molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in 1,2-Butanediol: 4
Atomic weight of
Carbon (C): 12.0107
Total weight of Carbon atoms in 1,2-Butanediol: 12.0107 x 4 = 48.0428

Number of Hydrogen atoms in 1,2-Butanediol: 10
Atomic weight of
Hydrogen (H): 1.008
Total weight of Hydrogen atoms in 1,2-Butanediol: 1.008 x 10 = 10.08

Number of Oxygen atoms in 1,2-Butanediol: 1
Atomic weight of Oxygen (O): 15.9994
Total weight of Oxygen atoms in 1,2-Butanediol: 15.9994 x 2 = 31.9988

Step 4: Calculate the molecular weight of 1,2-Butanediol by adding up the total weight of all atoms.

Molecular weight of 1,2-Butanediol: 48.0428 (Carbon) + 10.08 (Hydrogen) + 31.9988 (Oxygen) = 90.1216

So the molecular weight of 1,2-Butanediol is 90.1216.

1,2-Butanediol [CH3CH2CH(OH)CH2OH] Molecular Weight Calculation

Molecular weight of 1,2-Butanediol
Constituent atoms
Number of each atom
Atomic weightTotal weight
Carbon (C)412.010748.0428
Hydrogen (H)
10
1.00810.08
Oxygen (O)
2
15.999431.9988
Molecular weight of 1,2-Butanediol:
90.1216

REFERENCES:

  • Lanl-1: https://periodic.lanl.gov/1.shtml 
  • Pubchem-Hydrogen : https://pubchem.ncbi.nlm.nih.gov/element/Hydrogen 
  • Jlab-ele006; https://education.jlab.org/itselemental/ele006.html
  • Pubchem-6: https://pubchem.ncbi.nlm.nih.gov/element/6
  • Jlab-ele008: https://education.jlab.org/itselemental/ele008.html
  • Pubchem-8: https://pubchem.ncbi.nlm.nih.gov/element/8

See also:

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