The formula of ammonia is NH3 . Calculate its molecular mass.

Explanation

`KMnO_4` is the presence of dilute `H_2SO_4` acid act as oxidising agent and oxygen produced oxidises Ferrous salts to Ferric salt.
`{:(2KMno_4 + 3H_2SO_4, to , K_2SO_4 + 2MnSO_4 + 3H_2O + 5O),("["2FeSO_4 + H_2SO_4 + O,to , Fe(SO_4)_3 + H_2O"]" xx 5):}/(2KMnO_4 + 8H_2SO_4 + 10 FeSO_4 toK_2SO_4 + 2MnSO_4 + 5Fe(SO_4)_3 + 8H_2O)`
`KMnO_4` in the presence of dil.HCI also acts as oxidsing agent but Oxygen produced is used up partly for oxidation of HCI.
`{:(2KMnO_4 + 4HCl , to, 2KCl + 2MnCl_2 + 2H_2O + 6[O]),("["2HCl + [O] ,to, H_2O + Cl_2"]" xx 6):}/(2KMnO_4 + 16HCl to 2KCl + 2MnCl_2 + 8H_2O + 6Cl_2)`