The molecular weight of Ethyl butyrate [CH₃CH₂CH₂C(O)OC₂H₅] is 116.159.

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: Ethyl butyrate [CH₃CH₂CH₂C(O)OC₂H₅] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Ethyl butyrate molecule.
From the chemical formula, you will know different atoms and their number in a Ethyl butyrate molecule. Chemical formula of Ethyl butyrate is C₆H₁₂O₂. From the chemical formula of Ethyl butyrate, you can find that one molecule of Ethyl butyrate has six Carbon (C) atoms, twelve 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 Ethyl butyrate molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Ethyl butyrate: 6
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Ethyl butyrate: 12.0107 x 6 = 72.0642

Number of Hydrogen atoms in Ethyl butyrate: 12
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Ethyl butyrate: 1.008 x 12 = 12.096

Number of Oxygen atoms in Ethyl butyrate: 2
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Ethyl butyrate: 15.9994 x 2 = 31.9994

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

Molecular weight of Ethyl butyrate: 72.0642 (Carbon) + 12.096 (Hydrogen) + 31.9994 (Oxygen) = 116.159

So the molecular weight of Ethyl butyrate is 116.159.

Ethyl butyrate [CH₃CH₂CH₂C(O)OC₂H₅] 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

See also:

• DeoxyEthyl butyrate (C5H10O4) Molecular Weight Calculation