What percent by mass of ammonium sulfate
((NH4)2SO4) is nitrogen(N)?

The percentage of mass of nitrogen in ammonium sulfate is 21.20%

Explanation:

Solving this problem, we need to know that nitrogen is a gas and also we need to calculate the molar mass of the compound which (NH4)2SO4

Mm of (NH4)2SO4 =

N - 14.0067

H - 1.00784

S - 32.065

O - 15.999

Mm = (14.0067)2+(1.00784*4)2+32.065+(15.999*4)

Note: Because there are 4*2=8atoms of hydrogen and 4 atoms of oxygen and 2 atoms of nitrogen in the compound

Mm = 28.0134+ 8.06272+32.065+63.996

= 132.13712g/mol

Since there are two atoms of nitrogen in ammonium sulfate

The mm of N = 2 * 14.0067

= 28.0134g/mol

Therefore, to calculate percent massof N in (NH4)2SO4

We divide the mm of N by mm of (NH4)2SO4 multiplied by 100

i. e. 28.0134/132.14

= 0.212

= 0.212 * 100

= 21.20% mass of nitrogen