The molecular weight of Methane (CH₄) is 16.0427.

Methane (CH₄) is an organic compound of two elements: Carbon, and Hydrogen. The molecular weight of Methane is 16.0427 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: Methane  [CH₄] Molecular Weight Calculation

Step 1: Find out the chemical formula and determine constituent atoms and their number in a Methane molecule.
You will know different atoms and their number in a Methane molecule from the chemical formula. The chemical formula of Methane is CH₄. The chemical formula shows that one molecule of Methane consists of one Carbon (C) atom, and four Hydrogen (H) atoms.

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

Atomic weight of Carbon (C): 12.0107 (Ref: Jlab-ele006)
Atomic weight of Hydrogen (H): 1.008 (Ref: Lanl-1)

Step 3: Calculate the total weight of each atom in a Methane molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Methane: 1
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Methane: 12.0107 x 1 = 12.0107

Number of Hydrogen atoms in Methane: 4
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Methane: 1.008 x 4 = 4.032

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

Molecular weight of Methane: 12.0107 (Carbon) + 4.032 (Hydrogen) = 16.0427

So the molecular weight of Methane is 16.0427.

Methane [CH₄] Molecular Weight Calculation

REFERENCES:

• Lanl-1: https://periodic.lanl.gov/1.shtml 
• Jlab-ele006: https://education.jlab.org/itselemental/ele006.html 

See also:

• Hydrogen chloride molecular weight calculation