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ChemistryIntroductory Chemistry: A Foundation(a) Interpretation: The mass in grams of 125 iron atoms should be calculated. Concept Introduction: Number of moles is related to mass and molar mass as follows: n = m M Here, m is mass and M is molar mass. According to Avogadro’s law, 1 mole of a substance contains 6.023 × 10 23 atoms. This is known as Avogadro’s number and denoted by symbol N A . Thus, number of molecules can be calculated from number of moles using the following conversion factor: ( 6.023 × 10 23 molecules 1 mol ) .Start your trial now! First week only $4.99!*arrow_forward*

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9th Edition

Steven S. Zumdahl + 1 other

Publisher: Cengage Learning

ISBN: 9781337399425

Chapter 8, Problem 24QAP

Interpretation Introduction

**(a)**

**Interpretation:**

The mass in grams of 125 iron atoms should be calculated.

**Concept Introduction:**

Number of moles is related to mass and molar mass as follows:

Here, m is mass and M is molar mass.

According to Avogadro’s law, 1 mole of a substance contains

Thus, number of molecules can be calculated from number of moles using the following conversion factor:

Interpretation Introduction

**(b)**

**Interpretation:**

The mass (in amu) of 125 iron atoms should be calculated.

**Concept Introduction:**

Number of moles is related to mass and molar mass as follows:

Here, m is mass and M is molar mass.

According to Avogadro’s law, 1 mole of a substance contains

Thus, number of molecules can be calculated from number of moles using the following conversion factor:

Interpretation Introduction

**(c)**

**Interpretation:**

The number of moles of iron atoms is 125 g of iron should be calculated.

**Concept Introduction:**

Number of moles is related to mass and molar mass as follows:

Here, m is mass and M is molar mass.

According to Avogadro’s law, 1 mole of a substance contains

Thus, number of molecules can be calculated from number of moles using the following conversion factor:

Interpretation Introduction

**(d)**

**Interpretation:**

The mass in grams of 125 moles of iron should be calculated.

**Concept Introduction:**

Number of moles is related to mass and molar mass as follows:

Here, m is mass and M is molar mass.

Interpretation Introduction

**(e)**

**Interpretation:**

The number of iron atoms in 125 g of iron should be calculated.

**Concept Introduction:**

Number of moles is related to mass and molar mass as follows:

Here, m is mass and M is molar mass.

Interpretation Introduction

**(f)**

**Interpretation:**

The number of iron atoms should be calculated.

**Concept Introduction:**

Number of moles is related to mass and molar mass as follows:

Here, m is mass and M is molar mass.