Respuesta :
Answer:
Ammonia is the richest source of nitrogen on a mass percentage basis because it has 82.35% of nitrogen by mass.
Explanation:
Percentage of element in compound :
[tex]=\frac{\text{number of atoms}\times text{Atomic mass}}{\text{molar mas of compound}}\times 100[/tex]
(a) Urea, [tex](NH_2)_2CO[/tex]
Molar mass of urea = 60 g/mol
Atomic mass of nitrogen = 14 g/mol
Number of nitrogen atoms = 2
[tex]N\%=\frac{2\times 14 g/mol}{60 g/mol}\times 100=46.67\%[/tex]
(b) Ammonium nitrate, [tex]NH_4NO_3[/tex]
Molar mass of ammonium nitrate = 80 g/mol
Atomic mass of nitrogen = 14 g/mol
Number of nitrogen atoms = 2
[tex]N\%=\frac{2\times 14 g/mol}{80 g/mol}\times 100=35.00\%[/tex]
(c) Nitric oxide, NO
Molar mass of nitric oxide = 30 g/mol
Atomic mass of nitrogen = 14 g/mol
Number of nitrogen atoms = 1
[tex]N\%=\frac{1\times 14 g/mol}{30 g/mol}\times 100=46.67\%[/tex]
(d) Ammonia, [tex]NH_3[/tex]
Molar mass of ammona = 17 g/mol
Atomic mass of nitrogen = 14 g/mol
Number of nitrogen atoms = 1
[tex]N\%=\frac{1\times 14 g/mol}{17 g/mol}\times 100=82.35\%[/tex]
Ammonia is the richest source of nitrogen on a mass percentage basis because it has 82.35% of nitrogen by mass.
