The molecular weight of Acetylene (C_{2}H_{2}) is 26.0374.

Acetylene (C_{2}H_{2}) is an organic compound of two elements: Carbon, and Hydrogen. The molecular weight of Acetylene is 26.0374 which can be calculated by adding up the total weight (atomic weight multiplied by their number) of all its elements.

**CALCULATION PROCEDURE: Acetylene [C**_{2}H_{2}] Molecular Weight Calculation

_{2}H

_{2}] Molecular Weight Calculation

**Step 1: Find the chemical formula and determine constituent atoms and their number in an Acetylene molecule.**You will know different atoms and their number in an Acetylene molecule from the chemical formula. The chemical formula of Acetylene is C

_{2}H

_{2}. The chemical formula shows that one Acetylene molecule consists of two Carbon (C) atoms and 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 Acetylene molecule by multiplying its atomic weight by its number.**

Number of Carbon atoms in Acetylene: 2

Atomic weight of Carbon (C): 12.0107

Total weight of Carbon atoms in Acetylene: 12.0107 x 2 = 24.0214

Number of Hydrogen atoms in Acetylene: 2

Atomic weight of Hydrogen (H): 1.008

Total weight of Hydrogen atoms in Acetylene: 1.008 x 2 = 2.016

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

Molecular weight of Acetylene: 24.0214 (Carbon) + 2.016 (Hydrogen) = 26.0374

So the molecular weight of Acetylene is 26.0374.

Acetylene [C_{2}H_{2}] Molecular Weight Calculation

Molecular weight of Acetylene [C_{2}H_{2}] | |||

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

Carbon (C) | 2 | 12.0107 | 24.0214 |

Hydrogen (H) | 2 | 1.008 | 2.016 |

Molecular weight of Acetylene [C_{2}H_{2}]: | 26.0374 |

## REFERENCES:

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