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Chemistry In Focus

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

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Section
BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 15, Problem 3SC
Textbook Problem
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Examine the structures ethyl-2-methylbutanoate (see Figure 15.18) and civetone (see Figure 15.19). Upon opening a bottle containing a mixture of these two compounds, which one would dominate the initial smell?

ethyl-2-methylbutanoate

civetone

Interpretation Introduction

Interpretation:

The structures of ethyl-2-methylbutanoate and civetone are to be examined and upon opening a bottle containing the mixture of these two, which one would dominate initial smell is to be determined.

Concept introduction:

Civetone is an unsaturated macrocyclic ketone produced by the civet oil and it is one of the oldest ingredient of perfume.

Chemistry In Focus, Chapter 15, Problem 3SC

Civetone

Graham’s law states that the rate of diffusion is inversely proportional to the square root of mass of its particles.

Molar mass is defined as the ratio of moles (n) and mass of the element.

n=massmolarmass

Explanation of Solution

Reason for correct option:

Civetone is an organic compound composed of unsaturated ketone. Civetone has a higher molar mass than ethyl-2-methylbutanoate. But, both the compounds have a similar structure.

Hence, the difference of both components is shown by their molar mass.

First, write the molecular formula for civetone, which is C17H30O.

Molarmass of C17H30O=(12.0107×17+1.007×30+15.9994)=(204.1819+30.21+15.9994)=250.3913

Then, write the molecular formula for ethyl-2-mthylbutanoate, which is C7H14O2

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