The molecular weight of Icosane (C₂₀H₄₂) is 282.55.

Icosane (C₂₀H₄₂) is an organic compound of two elements: Carbon, and Hydrogen. The molecular weight of Icosane is 282.55 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

CALCULATION PROCEDURE: Icosane  [C₂₀H₄₂] Molecular Weight Calculation

Step 1: Find the chemical formula and determine constituent atoms and their number in an Icosane molecule.
You will know different atoms and their number in an Icosane molecule from the chemical formula. The chemical formula of Icosane is C₂₀H₄₂. The chemical formula shows that one Icosane molecule consists of twenty Carbon (C) atoms and forty-two 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 an Icosane molecule by multiplying its atomic weight by its number.

Number of Carbon atoms in Icosane: 20
Atomic weight of Carbon (C): 12.0107
Total weight of Carbon atoms in Icosane: 12.0107 x 20 = 240.214

Number of Hydrogen atoms in Icosane: 42
Atomic weight of Hydrogen (H): 1.008
Total weight of Hydrogen atoms in Icosane: 1.008 x 42 = 42.336

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

Molecular weight of Icosane: 240.214 (Carbon) + 42.336 (Hydrogen) = 282.55

So the molecular weight of Icosane is 282.55.

Icosane [C₂₀H₄₂] 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