A 1.000 g sample of the nitrate of a certain metal was thermally decomposed at 220 °C to give 0.4858 g of a solid residue. What nitrate was used in the experiment?
I did it on trial and error.
-Firstly assumed that a nitrite and oxygen are made;
-then the metal, oxygen and nitrogen(IV)-oxide;
-and then the oxide and nitrogen(IV)-oxide.
Here I got the answer Mn (55g/mol) to be the metal. The procedure I wrote takes a lot of time. Can I conclude somehow what could be made?