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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 5, Problem 45E
Textbook Problem
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The Lewis structures for CH 4 , N 2 , and CO 2 , along with the corresponding space-filling molecular images, are shown here:

Chapter 5, Problem 45E, The Lewis structures for CH4,N2,andCO2, along with the corresponding space-filling molecular images,

Use Lewis theory and VSEPR theory to draw similar space-filling molecular images of

a . CO b . NH 3 c . H 2 S d . SiH 4

Interpretation Introduction

Interpretation:

The space-filling molecular images using the Lewis and VSEPR theories are to be drawn.

Concept Introduction:

 The Lewis dot symbols contain dots, which give information about valence electrons.

 The Lewis dot symbols show both bonds and lone pairs as dots.

 The Lewis structures show bonds as lines and lone pairs as dots.

Explanation of Solution

a) CO

The number of valence electrons in CO is calculated as follows:

=(C atoms)+(O atom)=4+6=10

Now, only six electrons are used in bond formation to complete the octet of carbon and oxygen. So, the number of remaining electrons is four and there is one lone pair present on carbon and one on oxygen.

Therefore, the Lewis structure of CO is:

There are three bond pairs and two lone pairs. So, by VSEPR theory, the shape is linear because only two atoms are involved. So, the space-filling molecular image can be formed as follows:

b) NH3

The number of valence electrons in NH3 is as follows:

=(N atoms)+3(H atom)=5+3=8

Only six electrons are used in bond formation to complete the octet of nitrogen and hydrogen. Therefore, the number of remaining electrons is two and there is one lone pair present on nitrogen.

Hence, the Lewis structure of NH3 is:

There are three bond pairs and one lone pair. So, by VSEPR theory, the shape is tetrahedral because only four atoms are involved. So, the space-filling molecular image is as follows:

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Chapter 5 Solutions

Chemistry In Focus
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