Respuesta :
Answer:
The compounds in order from largest mass percent of nitrogen to smallest mass percent of nitrogen:
Urea > Ammonium sulfate > ammonium hydrogen sulfate
Explanation:
Percentage of mass of an element in a compound :
[tex]X(\%)=\frac{n\times A}{M}\times 100[/tex]
Where:
n = Number of atoms X
A = Atomic mass of atom X
M = Molar mass of compound
Percentage of nitrogen in urea;
Molar mass of urea,M = 60 g/mol
Atomic mass of nitrogen, A = 14 g/mol
n = 2
[tex]N\%=\frac{2\times 14 g/mol}{60 g/mol}\times 100=46.67\%[/tex]
Percentage of nitrogen in ammonium sulfate ;
Molar mass of urea,ammonium sulfate = 132 g/mol
Atomic mass of nitrogen, A = 14 g/mol
n = 2
[tex]N\%=\frac{2\times 14 g/mol}{132 g/mol}\times 100=21.21\%[/tex]
Percentage of nitrogen in ammonium hydrogen sulfate;
Molar mass of ammonium hydrogen sulfate ,M = 115 g/mol
Atomic mass of nitrogen, A = 14 g/mol
n = 2
[tex]N\%=\frac{1\times 14 g/mol}{115g/mol}\times 100=12.17\%[/tex]
The compounds in order from largest mass percent of nitrogen to smallest mass percent of nitrogen:
46.67% > 21.21%>12.17%
Urea > Ammonium sulfate > ammonium hydrogen sulfate
