How to write the ammonia formula?

Ammonia, also called azan or nitrogen trihydride, is the simplest inorganic base and an important nitrogen source for many applications. The chemical formula of ammonia is NH3 and its molar mass is 17.03 g / mol. The ammonia molecule has a trigonal pyramidal shape, with nitrogen bonded to three hydrogen atoms. Ammonia occurs naturally in the body and is secreted by the kidneys to neutralize excess acid. It also occurs in small amounts in rainwater, volcanic regions, and even in the atmosphere.