   # Using the average atomic masses given inside the front cover of this book, calculate how many moles of each substance the following masses represent l type='a'&gt; 4.15 g of silicon, Si 2.72 mg of gold(III) chloride, AuCl 3 i&gt;1.05 kg of sulfur, S1.000901 g of iron(III) chloride, FeCl 3 i&gt; 5.62 × 10 3 g of magnesium oxide, MgO ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781337399425

#### Solutions

Chapter
Section ### Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
Publisher: Cengage Learning
ISBN: 9781337399425
Chapter 9, Problem 19QAP
Textbook Problem
68 views

## Using the average atomic masses given inside the front cover of this book, calculate how many moles of each substance the following masses representl type='a'>4.15 g of silicon, Si2.72 mg of gold(III) chloride, AuCl 3 i>1.05 kg of sulfur, S1.000901 g of iron(III) chloride, FeCl 3 i>   5.62 × 10 3 g of magnesium oxide, MgO

Interpretation Introduction

(a)

Interpretation:

Number of moles of substance should be calculated.

Concept Introduction:

For a substance, number of moles is related to mass and molar mass of the substance as follows:

n=mM

Here, m is mass of substance in g and M is molar mass of substance in g/mol.

Thus, from number of moles, mass can be calculated as follows:

m=n×M.

### Explanation of Solution

Molar mass of Si =

28.09 g/mol

Number of moles=Mass of the sample in gramsMolar mass

Interpretation Introduction

(b)

Interpretation:

Number of moles of substance should be calculated.

Concept Introduction:

For a substance, number of moles is related to mass and molar mass of the substance as follows:

n=mM

Here, m is mass of substance in g and M is molar mass of substance in g/mol.

Thus, from number of moles, mass can be calculated as follows:

m=n×M.

Interpretation Introduction

(c)

Interpretation:

Number of moles of substance should be calculated.

Concept Introduction:

For a substance, number of moles is related to mass and molar mass of the substance as follows:

n=mM

Here, m is mass of substance in g and M is molar mass of substance in g/mol.

Thus, from number of moles, mass can be calculated as follows:

m=n×M.

Interpretation Introduction

(d)

Interpretation:

Number of moles of substance should be calculated.

Concept Introduction:

For a substance, number of moles is related to mass and molar mass of the substance as follows:

n=mM

Here, m is mass of substance in g and M is molar mass of substance in g/mol.

Thus, from number of moles, mass can be calculated as follows:

m=n×M.

Interpretation Introduction

(e)

Interpretation:

Number of moles of substance should be calculated.

Concept Introduction:

For a substance, number of moles is related to mass and molar mass of the substance as follows:

n=mM

Here, m is mass of substance in g and M is molar mass of substance in g/mol.

Thus, from number of moles, mass can be calculated as follows:

m=n×M.

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