   # Calculate the amount (moles) represented by each of the following: (a) 127.08 g of Cu (b) 0.012 g of lithium (c) 5.0 mg of americium (d) 6.75 g of Al ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640

#### Solutions

Chapter
Section ### Chemistry & Chemical Reactivity

9th Edition
John C. Kotz + 3 others
Publisher: Cengage Learning
ISBN: 9781133949640
Chapter 2, Problem 63PS
Textbook Problem
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## Calculate the amount (moles) represented by each of the following:(a) 127.08 g of Cu(b) 0.012 g of lithium(c) 5.0 mg of americium(d) 6.75 g of Al

(a)

Interpretation Introduction

Interpretation: For the given amounts of atoms in moles, the mass conversions are needed to be calculated.

Concept introduction:

• Conversion formula for mass of an atom into number moles,

Numberofmoles=MassingramsMolarmass

### Explanation of Solution

The amount of copper is given as 127.08g.

Molar mass of copper is 63.546g/mol.

Conversion formula for mass of an atom into number moles,

Numberofmoles=MassingramsMol

(b)

Interpretation Introduction

Interpretation: For the given amounts of atoms in moles, the mass conversions are needed to be calculated.

Concept introduction:

• Conversion formula for mass of an atom into number moles,

Numberofmoles=MassingramsMolarmass

(c)

Interpretation Introduction

Interpretation:

For the given amounts of atoms in moles, the mass conversions are needed to be calculated.

Concept introduction:

• Conversion formula for mass of an atom into number moles,

Numberofmoles=MassingramsMolarmass

(d)

Interpretation Introduction

Interpretation:

For the given amounts of atoms in moles, the mass conversions are needed to be calculated.

Concept introduction:

• Conversion formula for mass of an atom into number moles,

Numberofmoles=MassingramsMolarmass

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