The molecular weight of Icosane (C_{20}H_{42}) is 282.55.

Icosane (C_{20}H_{42}) 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 [C**_{20}H_{42}] Molecular Weight Calculation

_{20}H

_{42}] 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 C

_{20}H

_{42}. 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 [C_{20}H_{42}] Molecular Weight Calculation

Molecular weight of Icosane [C_{20}H_{42}] | |||

Constituent atoms | Number of each atom | Atomic weight | Total weight |

Carbon (C) | 20 | 12.0107 | 240.214 |

Hydrogen (H) | 42 | 1.008 | 42.336 |

Molecular weight of Icosane [C_{20}H_{42}]: | 282.55 |

## REFERENCES:

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