Isobutanol [(CH3)2CHCH2OH] Molecular Weight Calculation

The molecular weight of Isobutanol [C4H10O] is 74.1222.

To calculate molecular weight of any compound, the first step is to know the constituent atoms and their number in that particular compound. Then calculate the total weight of each atom by multiplying its atomic weight by its number. The sum of total weight of all constituent atoms will be the molecular weight of the compound. Note that the value of atomic weight may differ slightly from different sources.

CALCULATION PROCEDURE: Isobutanol [C4H10O] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Isobutanol molecule.
From the chemical formula, you will know different atoms and their number in a Isobutanol molecule. Chemical formula of Isobutanol is C4H10O. From the chemical formula of Isobutanol, you can find that one molecule of Isobutanol has four Carbon (C) atoms, ten Hydrogen (H) atoms and one Oxygen (O) atom.

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 Isobutanol molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Isobutanol: 4
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Isobutanol: 12.0107 x 4 = 48.0428

Number of Hydrogen atoms in Isobutanol: 10
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Isobutanol: 1.008 x 10 = 10.08

Number of Oxygen atoms in Isobutanol: 1
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Isobutanol: 15.9994 x 1 = 15.9994

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

Molecular weight of Isobutanol: 48.0428 (Carbon) + 10.08 (Hydrogen) + 15.9994 (Oxygen) = 74.1222

So the molecular weight of Isobutanol is 74.1222.

Isobutanol [C3H4O6] Molecular Weight Calculation

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