Rank the following fertilizers in decreasing order of mass percentage of nitrogen:

Question

NH3
NH4NO3
(NH4)2HPO4
KNO3
(NH4)H2PO4
(NH4)2SO4

Answer 1

You need to work out the mass percentage of N in each. So in each case you need to the molar mass then calculate the % N content from

Total mass of N x100%/(molar mass)

Answer 2

i worked out the mass percentage of N in each and this is what i got
NH3=82.25%
NH4NO3=35%
(NH4)2HPO4=21.4%
KNO3=13.85%
(NH4)H2PO4=12.17%
(NH4)2SO4=11.85%

i put in order and still get it wrong -__-
Total mass of N x100%/(molar mass)

Answer 3

NH3
NH4NO3
(NH4)2HPO4
(NH4)2SO4
KNO3
(NH4)H2PO4

Answer 4

NH3
NH4NO3
(NH4)2HPO4
(NH4)2SO4
KNO3
(NH4)H2PO4