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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 3, Problem 59E
Textbook Problem
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When we refer to doughnuts or cookies, we often refer to 1doz of them, which corresponds to 12. Why is the dozen an inconvenient number when referring to atoms? Why is Avogadro’s number, 6 .022  ×  10 23 , more convenient?

Interpretation Introduction

Interpretation:

The reason why Avogadro’s number is more convenient than dozens with reference to atoms is to be explained.

Concept Introduction:

 Dozen is used to represent a collection of twelve units of the same type.

 Avogadro’s number refers to 6.022×1023 units of the same type.

Explanation of Solution

A single atom cannot be viewed with the naked eye, while it can be seen by electron microscopes. In the macroscopic world, even a dozen atoms could not be seen. But, to measure quantity/mass/length, we always use scales. For example, we have developed several scales to measure of length to fit for different distances. We would like to measure a length of a rod/stick in terms of ‘cm/m’ but we will use ‘k...

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Chapter 3 Solutions

Chemistry In Focus
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