Calculate the molar mass of ammonia

Ammonia formula also referred to as nitrogen trihydride formula or azane formula is one of the most popular formulas in chemistry. Ammonia is basically a colourless inorganic or alkaline gas having a distinct pungent odour. The compound ammonia is further an important source of nitrogen for many applications in chemical and industrial processes.


Ammonia formula is given as NH3. The molecular formula is derived from the chemical structure of ammonia where

  • The ammonia molecule exhibits a trigonal pyramidal shape with nitrogen attached to the three hydrogen atoms.
  • The nitrogen atom, on the other hand, has a lone electron pair.

Molar mass

To estimate the molar mass of any compound, we have to add up the molar masses of every atom of the given compound. Ammonia comprises of one nitrogen atom and three hydrogen atoms.

So the molar mass of ammonia is

N: 14.0067 g/mol
H: 1.00794 g/mol
The molar mass of ammonia will thus be

14.0067 g/mol +3× 1.00794 g/mol =17.03052 g/mol


Molar mass of ammonia is 17.03052 g/mol

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