Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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What is the correct answer and why?
![**Question:**
What is the hydrogen deficiency of C₅H₆O?
**Options:**
- ○ 1
- ○ 2
- ○ 3
- ○ 4
**Explanation:**
Hydrogen deficiency, also known as the degree of unsaturation or index of hydrogen deficiency (IHD), indicates the number of rings and/or multiple bonds (double or triple) present in a molecule. It is calculated using the formula:
\[ \text{IHD} = \frac{2C + 2 + N - H - X}{2} \]
Where:
- \( C \) = number of carbon atoms
- \( N \) = number of nitrogen atoms
- \( H \) = number of hydrogen atoms
- \( X \) = number of halogen atoms
For C₅H₆O:
- \( C = 5 \)
- \( H = 6 \)
- \( O = 1 \) (Oxygen does not affect the hydrogen deficiency calculation)
- No nitrogen or halogens are present.
Substituting these into the formula:
\[ \text{IHD} = \frac{2(5) + 2 - 6}{2} = \frac{10 + 2 - 6}{2} = \frac{6}{2} = 3 \]
Therefore, the hydrogen deficiency of C₅H₆O is 3.](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe59c93b1-dc19-4e35-8dd7-f19496d72abd%2F4ba2dfca-1f02-4d43-a70c-236404b53e2a%2Ftae6iff_processed.jpeg&w=3840&q=75)
Transcribed Image Text:**Question:**
What is the hydrogen deficiency of C₅H₆O?
**Options:**
- ○ 1
- ○ 2
- ○ 3
- ○ 4
**Explanation:**
Hydrogen deficiency, also known as the degree of unsaturation or index of hydrogen deficiency (IHD), indicates the number of rings and/or multiple bonds (double or triple) present in a molecule. It is calculated using the formula:
\[ \text{IHD} = \frac{2C + 2 + N - H - X}{2} \]
Where:
- \( C \) = number of carbon atoms
- \( N \) = number of nitrogen atoms
- \( H \) = number of hydrogen atoms
- \( X \) = number of halogen atoms
For C₅H₆O:
- \( C = 5 \)
- \( H = 6 \)
- \( O = 1 \) (Oxygen does not affect the hydrogen deficiency calculation)
- No nitrogen or halogens are present.
Substituting these into the formula:
\[ \text{IHD} = \frac{2(5) + 2 - 6}{2} = \frac{10 + 2 - 6}{2} = \frac{6}{2} = 3 \]
Therefore, the hydrogen deficiency of C₅H₆O is 3.
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