# Methanediol [CH2(OH)2] Molecular Weight Calculation

The molecular weight of Methanediol [CH2(OH)2] 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: Methanediol [CH2(OH)2] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Methanediol molecule.
From the chemical formula, you will know different atoms and their number in a Methanediol molecule. Chemical formula of Methanediol is C1H4O2. From the chemical formula of Methanediol, you can find that one molecule of Methanediol has one Carbon (C) atom, four 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 Methanediol molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Methanediol: 1
Atomic weight of Carbon: 12.0107
Total weight of Carbon atoms in Methanediol: 12.0107 x 1 = 12.0107

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

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

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

Molecular weight of Methanediol: 12.0107 (Carbon) + 4.032 (Hydrogen) + 31.9994 (Oxygen) = 116.159

So the molecular weight of Methanediol is 116.159.

Methanediol [CH2(OH)2] 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