Chapter 5, Problem 5.84QP

Interpretation Introduction

Interpretation:

The number molecules of ethane $\left({\text{C}}_{\text{2}}{\text{H}}_{\text{6}}\right)$ is given by using mass value of ethane to be calculated.

Concept introduction:

The mole is the unit for quantity of molecules or other kind of particles. There is no possibility to convert the given substance in grams to atoms. So, it should be done in two steps.

Conversion of grams into moles formula:

$\frac{\text{Atoms}}{\text{Avagadro}\text{number}}\text{= moles}$

Conversion of moles into atoms formula:

moles $\text{x}$ atomic mass = molecules