Question

What is the formula of dihydrogen?

Answer 1

Dihydrogen is a molecule formed from the hydrogen atoms. It is a homonuclear molecule which means it is a molecule which has the same atoms in it and no other atom is part of the molecule. This molecule consists of a covalent bond between the hydrogen atoms. It is a molecule with linear shape because a single bond is present.

Complete answer:
Dihydrogen is a gas which is made up of hydrogen atoms which is the lightest atom and hence, it is the lightest gas. Dihydrogen is a colourless, tasteless, and odourless gas and it is highly combustible in nature.
Dihydrogen as the name suggests consists of two hydrogens atoms in the molecule.
The structure of dihydrogen gas is:

Therefore, we can say that the molecular formula of dihydrogen is ${H_2}$ .

Additional information:
(1) This molecule is nonpolar and has a linear shape.
(2) Each hydrogen atom shares one electron towards the covalent bond.
(3) The boiling point of dihydrogen is $20.271K$ or $- {252.879^o}C$ .
(4) The latent heat of fusion of dihydrogen molecule is $0.117{\text{KJmo}}{{\text{l}}^{{\text{ - 1}}}}$ .
(5) The latent heat of vaporization (enthalpy of vaporization) of dihydrogen is $0.904KJmo{l^{ - 1}}$.
(6) The molar heat capacity of this molecule is around $28.83J{K^{ - 1}}$ .

Note:
There are many applications of dihydrogen gas such as it is used in manufacturing of ammonia and for refining some of the fossil fuels. Dihydrogen is a good reducing agent and hence can be used in many reactions. It can be used as a hydrogenating agent to increase the saturation level of the unsaturated oils and fats.