Chapter 5, Problem 5.87QP

Interpretation Introduction

Interpretation:

The number of molecules of ${\text{C}}_{\text{10}}{\text{H}}_{\text{16}}\text{O}$ is given by using the mass of ${\text{C}}_{\text{10}}{\text{H}}_{\text{16}}\text{O}$ 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.

= $\frac{{\text{X grams of C}}_{\text{10}}{\text{H}}_{\text{16}}\text{O}}{\text{molar}\text{mass}{\text{of C}}_{\text{10}}{\text{H}}_{\text{16}}\text{O}}\text{×Avagadro's number}$