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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 34E
Textbook Problem
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Determine whether each molecule is polar:

a . HF b . O 2 c . NO d . H 2

Interpretation Introduction

Interpretation:

The molecular polarity is to be determined for the given molecules.

Concept Introduction:

A polar bond is formed between elements with different electronegativities. Due to uneven electron distribution, there is charge separation resulting in a dipole. Nonpolar molecules do not have charge separation.

If a molecule has polar bonds, it may or may not be polar, depending on the molecular geometry. Determine the geometry of the molecule using the VSEPR theory and then determine whether the polar bonds add together giving polarity to the molecule or they cancel.

Explanation of Solution

a) HF

The Lewis structure of HF is as follows:

HF is a linear diatomic molecule. Hydrogen atom is covalently bonded to fluorine atom. Due to the difference in the electronegativities of hydrogen and fluorine, the bond is polar between H and F. Hence, HF is a polar molecule.

b) O2

The Lewis structure of O2 is as follows:

It is a linear diatomic molecule. Two oxygen atoms are bonded to each other with a covalent bond. Both have six valence electrons. As the bond is between two identical atoms, the bond is not polar. Hence, O2 is a non-polar molecule.

c) NO

The Lewis structure of NO is as follows:

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Chapter 5 Solutions

Chemistry In Focus
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Ch. 5 - Based on the Lewis structures for hydrogen and...Ch. 5 - In Chapter 3, we also learned that fluorine exists...Ch. 5 - Suppose that when drawing a Lewis structure for a...Ch. 5 - Carbon dioxide and water are both composed of a...Ch. 5 - Which one of the following bonds is polar? a. a...Ch. 5 - A nonpolar molecule has polar bonds. What must be...Ch. 5 - Why is salt, NaCl, relatively harmless even though...Ch. 5 - If sodium is dropped into water, a loud fizzing...Ch. 5 - Explain ionic bonding according to Lewis theory.Ch. 5 - Explain covalent bonding according to Lewis...Ch. 5 - Why is Lewis theory useful? Give some examples.Ch. 5 - Give the Bohr electron configuration and Lewis...Ch. 5 - Draw electron dot structures for the following...Ch. 5 - Explain VSEPR theory. According to this theory,...Ch. 5 - Why are the shapes of molecules important?Ch. 5 - Describe a polar covalent bond.Ch. 5 - In what ways is water unique? What about the water...Ch. 5 - What is the difference between a polar and a...Ch. 5 - Why do polar molecules have a greater tendency to...Ch. 5 - Explain, in molecular terms, why oil and water do...Ch. 5 - Lewis Structures for Atoms Draw Lewis structures...Ch. 5 - Draw Lewis structures for each of the following...Ch. 5 - Ionic Lewis Structures Draw a Lewis structure for...Ch. 5 - Draw a Lewis structure for each of the following...Ch. 5 - Draw a Lewis structure for each of the following...Ch. 5 - Draw a Lewis structure for each of the following...Ch. 5 - Covalent Lewis Structures Draw a Lewis structure...Ch. 5 - Draw a Lewis structure for each molecular...Ch. 5 - General Lewis Structures Determine whether each...Ch. 5 - Determine whether each compound is ionic or...Ch. 5 - What is wrong with each Lewis structure? Fix the...Ch. 5 - What is wrong with each Lewis structure? Fix the...Ch. 5 - Predicting the Shapes of Molecules Use VSEPR...Ch. 5 - Use VSEPR theory to determine the geometry of the...Ch. 5 - Draw a Lewis structure and use VSEPR theory to...Ch. 5 - Draw a Lewis structure and use VSEPR theory to...Ch. 5 - CF2Cl2 is a chlorofluorocarbon implicated in ozone...Ch. 5 - Chlorofluorocarbons have been banned because they...Ch. 5 - Determining Molecular Polarity Determine whether...Ch. 5 - Determine whether each molecule is polar:...Ch. 5 - Determine whether each molecule is polar:...Ch. 5 - Determine whether each molecule is polar:...Ch. 5 - Explain why water would be a gas at room...Ch. 5 - What is the molecular reason behind the hexagonal...Ch. 5 - What would happen to the amount of UV light...Ch. 5 - One of the observations that led G. N. Lewis to...Ch. 5 - G. N. Lewis developed a model for chemical bonding...Ch. 5 - The opening quote of this chapter states that Man...Ch. 5 - Draw a Lewis structure of the H2 molecule. If you...Ch. 5 - Since the time of G. N. Lewis, other, more...Ch. 5 - The Lewis structures for CH4,N2,andCO2, along with...Ch. 5 - CH3COCH3 (acetone) is a common laboratory solvent...

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