Hydrogen Peroxide [H2O2] Molecular Weight Calculation

The molecular weight of Hydrogen peroxide [H2O2] is 34.0148.

Hydrogen peroxide [H2O2] Molecular Weight CalculationTo 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: Hydrogen peroxide [H2O2] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Hydrogen peroxide molecule.
From the chemical formula, you will know different atoms and their number in a Hydrogen peroxide molecule. Chemical formula of Hydrogen peroxide is H2O2. From the chemical formula of Hydrogen peroxide, you can find that one molecule of Hydrogen peroxide has two Hydrogen (H) atoms and two Oxygen (O) atoms.

Step 2: Find out atomic weights of each atom (from periodic table).

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 Hydrogen peroxide molecule by multiplying its atomic weight by its number.

Number of Hydrogen atoms in Hydrogen peroxide: 2
Atomic weight of Hydrogen: 1.008
Total weight of Hydrogen atoms in Hydrogen peroxide: 1.008 x 2 = 2.016

Number of Oxygen atoms in Hydrogen peroxide: 2
Atomic weight of Oxygen: 15.9994
Total weight of Oxygen atoms in Hydrogen peroxide: 15.9994 x 2 = 31.9988

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

Molecular weight of Hydrogen peroxide: 2.016 (Hydrogen) + 31.9988 (Oxygen) = 34.0148

So the molecular weight of Hydrogen peroxide is 34.0148.

Hydrogen peroxide [H2O2] Molecular Weight Calculation

Molecular weight of Hydrogen peroxide
Constituent atoms
Number of each atom
Atomic weightTotal weight
Hydrogen (H)
2
1.0082.016
Oxygen (O)
2
15.999431.9988
Molecular weight of Hydrogen peroxide:
34.0148

REFERENCES:

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

See also:

Was this post helpful?

Author: admin

Leave a Reply

Your email address will not be published. Required fields are marked *