   # Using the average atomic masses given inside the front cover of this hook, calculate the mass in grains of each of the following samples. l type='a'&gt; 0.341 mole of potassium nitride 2.62 mmol of neon (1 mmol = 1/1000 mol) 0.00449 mole of manganese(II) oxide 7.18 × 10 5 moles of silicon dioxide 0.00021 mole of iron(III) phosphate ### 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 22QAP
Textbook Problem
10 views

## Using the average atomic masses given inside the front cover of this hook, calculate the mass in grains of each of the following samples.l type='a'>0.341 mole of potassium nitride2.62 mmol of neon (1 mmol = 1/1000 mol)0.00449 mole of manganese(II) oxide   7.18 × 10 5 moles of silicon dioxide0.00021 mole of iron(III) phosphate

Interpretation Introduction

(a)

Interpretation:

The mass corresponding to a given number of moles of potassium iodide should be determined.

Concept Introduction:

Mole is a unit used to quantify or measure the number of molecules in a given compound. One mole of any entity contains a constant (6.022 x 10-23) number of entities. This constant is known as the Avogadro constant.

The mass of one mole of any compound is known as the molar mass.

### Explanation of Solution

Potassium nitride is an ionic compound. Ionic compounds are neutral meaning that the net charge of such compounds must be zero. It is composed of K+ ions and N3 - ions. By interchanging the charges (such that the net charge would become zero) one could deduce that the correct formula is K3 N.

atomic mass of K = 39.10 g/molatomic mass of N  = 14.01 g/mol

Chemical Formula of Potassium nitride = K3 N

1 mol of K3N=(39

Interpretation Introduction

(b)

Interpretation:

The mass corresponding to a given number of moles of Neon should be determined.

Concept Introduction:

Mole is a unit used to quantify or measure the number of molecules in a given compound. One mole of any entity contains a constant (6.022 x 10-23) number of entities. This constant is known as the Avogadro constant.

The mass of one mole of any compound is known as the molar mass.

Interpretation Introduction

(c)

Interpretation:

The mass corresponding to a given number of moles of Manganese(II) Oxide should be determined.

Concept Introduction:

Mole is a unit used to quantify or measure the number of molecules in a given compound. One mole of any entity contains a constant (6.022 x 10-23) number of entities. This constant is known as the Avogadro constant.

The mass of one mole of any compound is known as the molar mass.

Interpretation Introduction

(d)

Interpretation:

The mass corresponding to a given number of moles of silicon dioxide should be determined.

Concept Introduction:

Mole is a unit used to quantify or measure the number of molecules in a given compound. One mole of any entity contains a constant (6.022 x 10-23) number of entities. This constant is known as the Avogadro constant.

The mass of one mole of any compound is known as the molar mass.

Interpretation Introduction

(e)

Interpretation:

The mass corresponding to a given number of moles of iron(III) phosphate.

Concept Introduction:

Mole is a unit used to quantify or measure the number of molecules in a given compound. One mole of any entity contains a constant (6.022 x 10-23) number of entities. This constant is known as the Avogadro constant.

The mass of one mole of any compound is known as the molar mass.

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