Sample
% Nitrogen
Fertilizer from Suspect #1 20.5%
Fertilizer from Suspect #2 21.0%
Fertilizer from Suspect #3 33.5%
a. What percentage of ammonium sulfate, $(NH_4)_2SO_4$, is nitrogen?
b. What percentage of ammonium nitrate, $NH_4NO_3$, is nitrogen?
c. What percentage of diammonium phosphate, $(NH_4)_2HPO_4$, is nitrogen?