The molecular weight of Ethylene oxide (C₂H₄O) is 44.0528.

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: Ethylene oxide (C₂H₄O) Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Ethylene oxide molecule.
From the chemical formula, you will know different atoms and their number in a Ethylene oxide molecule. Chemical formula of Ethylene oxide is C₂H₄O. From the chemical formula of Ethylene oxide, you can find that one molecule of Ethylene oxide has two Carbon (C) atoms, four 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 Ethylene oxide molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Ethylene oxide: 2
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Ethylene oxide: 12.0107 x 2 = 24.0214

Number of Hydrogen atoms in Ethylene oxide: 4
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Ethylene oxide: 1.008 x 4 = 4.032

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

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

Molecular weight of Ethylene oxide: 24.0214 (Carbon) + 4.032 (Hydrogen) + 15.9994 (Oxygen) = 44.0528

So the molecular weight of Ethylene oxide is 44.0528.

Ethylene oxide (C₂H₄O) 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:

• Apiose (C5H10O5) Molecular Weight Calculation