6.1 Improving processes and products

A farmer wants to use the fertiliser with the highest percentage by mass of 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 C = 12.0 N = 14.0 O = 16.0 S = 32.1 K = 39.1

Which fertiliser should the farmer choose?

[1]

Ammonium nitrate, $NH4NO3\mathrm{NH_{4}NO_{3}}$

Ammonium sulfate, $(NH4)2SO4\mathrm{(NH_{4})_{2}SO_{4}}$

Potassium nitrate, $KNO3\mathrm{KNO_{3}}$

Urea, $(NH2)2CO\mathrm{(NH_{2})_{2}CO}$

A farmer wants to use the fertiliser with the highest percentage by mass of 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 C = 12.0 N = 14.0 O = 16.0 S = 32.1 K = 39.1

Which fertiliser should the farmer choose?

Ammonium nitrate, $NH4NO3\mathrm{NH_{4}NO_{3}}$

Ammonium sulfate, $(NH4)2SO4\mathrm{(NH_{4})_{2}SO_{4}}$

Potassium nitrate, $KNO3\mathrm{KNO_{3}}$

Urea, $(NH2)2CO\mathrm{(NH_{2})_{2}CO}$

6.1 Improving processes and products Questions