Chapter 3, Problem 3.21P

Interpretation Introduction

Interpretation:Fertilizers that include ${\text{KNO}}_{\text{3}}$ , ${\text{NH}}_{\text{4}}{\text{NO}}_{\text{3}}$ ; ${\left({\text{NH}}_{\text{4}}\right)}_2{\text{SO}}_{\text{4}}$ and ${\text{H}}_2{\text{NCONH}}_2$ should be ranked in order of effectiveness.

Concept introduction: The formula to calculate $\text{mass \% N}$ is as follows:

  $\text{Mass \% N}=\left(\frac{\left(\text{Moles of}\text{N}\right)\left(\text{Molar mass of}\text{N}\right)}{\text{Mass of 1 mol compound}}\right)\left(100\text{ \%}\right)$

  $\text{Mass \% N}$ is indicative of effectiveness of any fertilizer.