Hydrogen Gas Formula

Define Hydrogen Gas Formula

One of the simplest formulas used in chemistry is the hydrogen gas formula. The first element mentioned in the periodic table is hydrogen. The properties that describe hydrogen gas are odourless, colourless, tasteless, non-metallic and highly combustible gas. It is the most abundant element found in the universe, especially in giant gas planets and stars. Being one of the smallest chemical elements, it comprises only one proton in the nucleus. It was during the 16th century, hydrogen gas for the first time was manufactured using metals and acids. 

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The Process of Production of Hydrogen

Hydrogen can be prepared in various ways, and we have listed two crucial methods below. 

  • By passing an electric current through the water there is a split in hydrogen and oxygen molecules. This is known as electrolysis. 

  • When natural gas is reacted with steam at a very high temperature the resultant mixture is hydrogen gas, carbon dioxide, and carbon monoxide. 

Chemical Formula Using Hydrogen 

Here’s a list of important chemical formulas that include hydrogen to form a compound. 

  • Hydrogen sulfate formula- HO4S-

  • Hydrogen sulfide formula- H2S

  • Hydrogen iodide formula- HI

  • Hydrogen bromide formula- HBr

  • Hydrogen cyanide formula- HCN


Hydrogen has been recognized as a vital element that is used in the clean-burning of fuel. It is a non-metallic component that comes with a molecular formula of H2

Hydrogen as a gas is non-carcinogenic and non-toxic in nature. It can be stored as a compressed gas or liquid that is reliable for internal combustion in vehicles.

FAQs (Frequently Asked Questions)

1. Explain the Hydrogen Sulphide Formula?

Ans: In a laboratory, when sulphide is treated with some standard acids it results in the formation of a weak acid known as H2S along with other salts and metals. H2S chemical name is hydrogen sulphide, a gas that is commonly found in the drilling and production of crude oil and natural gas. It is also found in wastewater treatment facilities and sewers. Its presence can be detected with its strong rotten egg smell. Moreover, the gas is colourless, highly flammable, corrosive, and toxic in nature.  

The standard laboratory preparation of hydrogen sulphide formula involves the use of ferrous sulphide to produce H2S:

FeS + 2 HCl → FeCl2 + H2S

Thioacetamide is also used to generate H2S in quantitative inorganic analysis. 

CH3C(S)NH2 + H2O → CH3C(O)NH2 + H2S

2. State the Chemical Structure of Hydrogen Formula?

Ans: In a hydrogen formula, the gas mainly consists of hydrogen atoms that form diatomic molecules. The molecular formula of hydrogen gas can be established by observing the hydrogen atoms. Typically, a pair of hydrogen atoms are seen to be bonded together into molecules. As a result, the formula is written and expressed as H2






0.0893 g/L

Molecular weight of hydrogen 

2.016 g/mol

Boiling Point

-252.9 °C

Melting Point

-259.2 °C

The structural representation of the hydrogen chemical formula is given below:

H -------- H 

3. What are the Uses of Hydrogen Gas or H2?

Ans: There are several uses of hydrogen gas which are discussed below in detail for you. 

  • The flame produced from hydrogen and oxygen can produce a temperature of 2800oc. This hydrogen-oxygen flame is implemented for the purpose of welding and cutting metals. 

  • Hydrogen is used in the hydrogenation process of the vegetable oils that transforms edible vegetable oils into vanaspati oils. 

  • Hydrogen gas has applications and uses in fuel cell electric vehicles and combustion engines. 

  • In weather observation balloons, an equal volume of helium and hydrogen gas is used for filling.

  • Hydrogen is also used in breaking crude oil into fuel oils and gasoline.