A garden centre sells four fertilisers that each contain nitrogen.

Use the equation: percentage of nitrogen = (total $A_{r}$ of nitrogen atoms $÷\div$ $M_{r}$ ) $\times\,$ 100

Relative atomic mass ( $A_{r}$ ): H = 1.0 N = 14.0 O = 16.0 P = 31.0 Cl = 35.5 Ca = 40.1

Which fertiliser contains the lowest percentage by mass of nitrogen?

Ammonium phosphate, $(NH4)3PO4\mathrm{(NH_{4})_{3}PO_{4}}$

Diammonium phosphate, $(NH4)2HPO4\mathrm{(NH_{4})_{2}HPO_{4}}$

Ammonium chloride, $NH4Cl\mathrm{NH_{4}Cl}$

Calcium nitrate, $Ca(NO3)2\mathrm{Ca(NO_{3})_{2}}$

A garden centre sells four fertilisers that each contain nitrogen.

Use the equation: percentage of nitrogen = (total $A_{r}$ of nitrogen atoms $÷\div$ $M_{r}$ ) $\times\,$ 100

Relative atomic mass ( $A_{r}$ ): H = 1.0 N = 14.0 O = 16.0 P = 31.0 Cl = 35.5 Ca = 40.1

Which fertiliser contains the lowest percentage by mass of nitrogen?

Ammonium phosphate, $(NH4)3PO4\mathrm{(NH_{4})_{3}PO_{4}}$

Diammonium phosphate, $(NH4)2HPO4\mathrm{(NH_{4})_{2}HPO_{4}}$

Ammonium chloride, $NH4Cl\mathrm{NH_{4}Cl}$

Calcium nitrate, $Ca(NO3)2\mathrm{Ca(NO_{3})_{2}}$

6.1 Improving processes and products

6.1 Improving processes and products Questions