Calculate the molecular masses of H2.

By BYJU'S Exam Prep

Updated on: September 25th, 2023

2 g/mole is the molecular mass of H2. The total mass of all the constituent atoms that make up a molecule or compound is known as its molar mass.

  • The atomic mass of hydrogen H is 1u.
  • The atomic mass of Nitrogen N is 14u.
  • The atomic mass of carbon is 12u.
  • The atomic mass of Oxygen is 16u.
  • The atomic mass of chlorine is 35.5u.

The molecular mass of H2 = 2 x the Atomic mass of hydrogen

= 2 x 1

= 2 g/mole

Physical Properties of Hydrogen

  1. The least dense of all gases, it is a colorless, odorless gas. It is regarded as the clean fuel of the future since it is made from water and, after oxidation, turns back into the water.
  2. It can be found in practically all living organisms’ molecules, including water. It continues to be joined to oxygen and carbon atoms. It might be argued that this element is the most prevalent one in the cosmos.
  3. One part per million of the atmosphere contains it as a gas. Clean, non-toxic, and safe to manufacture from a variety of sources, transport, and store in big quantities is hydrogen.
  4. Because it holds energy that was previously created somewhere else, it is called an energy carrier.
  5. In the sixteenth century, this substance was created synthetically. It was given the name hydrogen, which is Greek for water-former.


Calculate the molecular masses of H2.

The molecular mass of H2 is 2 g/mole. A molecule or compound’s molar mass is the sum of the masses of all the individual atoms that comprise it. The total mass of the constituents present in an atom that make up a compound or a molecule is called its molar mass.

Our Apps Playstore
SSC and Bank
Other Exams
GradeStack Learning Pvt. Ltd.Windsor IT Park, Tower - A, 2nd Floor, Sector 125, Noida, Uttar Pradesh 201303
Home Practice Test Series Premium