Chapter 5, Problem 5.86QP

Interpretation Introduction

Interpretation:

The number of C, H, N and O atoms of urea $\left[{\left({\text{NH}}_{\text{2}}\right)}_{\text{2}}\text{CO}\right]$ is given by using the mass to be calculated.

Concept introduction:

First, calculate the molar mass of urea to convert the mass given into moles. Then, multiply the obtained moles by Avogadro’s number to get the answer.

= $\frac{\text{X grams of}{\left({\text{NH}}_{\text{2}}\right)}_{\text{2}}\text{CO}}{\text{molar}\text{mass}\text{of}{\left({\text{NH}}_{\text{2}}\right)}_{\text{2}}\text{CO}}\text{×Avagadro's number}$