Chapter 8, Problem 11E

Interpretation Introduction

(a)

Interpretation:

The number of moles containing $\text{2}\text{.50}\times {\text{10}}^{\text{22}}$ atoms of iron, $\text{Fe}$, is to be stated

Concept introduction:

A mole is the amount of substance that has Avogadro’s number of particles. Avogadro’s number is equal to $\text{6}\text{.02}\times {\text{10}}^{\text{23}}$. Mathematically, the mole is the ratio of the mass and the molecular mass of the substances.

$\text{Mole}=\frac{\text{Mass}}{\text{Molecular mass}}$

One mole of atoms or molecules is equal to $\text{6}\text{.02}\times {\text{10}}^{\text{23}}$ particles.

Interpretation Introduction

(b)

Interpretation:

The number of moles containing $5.00\times {10}^{23}$ molecules of sulfur trioxide, ${\text{SO}}_{\text{3}}$ is to be stated.

Concept introduction:

A mole is the amount of substance that has Avogadro’s number of particles. Avogadro’s number is equal to $\text{6}\text{.02}\times {\text{10}}^{\text{23}}$. Mathematically, the mole is the ratio of the mass and the molecular mass of the substances.

$\text{Mole}=\frac{\text{Mass}}{\text{Molecular mass}}$

One mole of atoms or molecules is equal to $\text{6}\text{.02}\times {\text{10}}^{\text{23}}$ particles.

Interpretation Introduction

(c)

Interpretation:

The number of moles containing $7.50\times {10}^{24}$ formula units of iron $\left(\text{II}\right)$ sulfate, ${\text{FeSO}}_{\text{4}}$, is to be stated.

Concept introduction:

A mole is the amount of substance that has Avogadro’s number of particles. Avogadro’s number is equal to $\text{6}\text{.02}\times {\text{10}}^{\text{23}}$. Mathematically, the mole is the ratio of the mass and the molecular mass of the substances.

$\text{Mole}=\frac{\text{Mass}}{\text{Molecular mass}}$

One mole of atoms or molecules is equal to $\text{6}\text{.02}\times {\text{10}}^{\text{23}}$ particles.