Chapter 3, Problem 3.108P

(a)

Interpretation Introduction

Interpretation: $\text{Mass \% N}$ is to be calculatedfor urea, arginine, and ornithine.

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

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

(b)

Interpretation Introduction

Interpretation:Mass of nitrogen excreted as urea is to be calculated.

Concept introduction:The formula to convert moles to mass in grams is as follows:

  $\text{Mass}=\left(\text{Number of moles}\right)\left(\text{molar mass}\right)$