Ammonia formula is NH3 and its molar mass is 17.03 g/mol. It is a chemical compound made of nitrogen and hydrogen. It is a colourless gas with a very bad pungent smell. In humans and other aquatic organisms, it is a common nitrogenous waste and contributes to the nutritional needs of terrestrial organisms. Ammonia is a colorless gas with the chemical formula NH3, consisting of hydrogen and nitrogen. Learn about its structure, properties, preparation, uses and FAQs on this web page. Ammonia Formula : With the formula NH3, ammonia is a nitrogen and hydrogen inorganic chemical. Let us know about the Ammonia Formula , Structure, Symbol.