# At sea level, the normal percentage of carbon dioxide (CO 2 ) in the atmosphere is A. 5% B. 40% C. 78% D. 0.03%

### Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
Publisher: Cengage Learning,
ISBN: 9781337794909

### Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
Publisher: Cengage Learning,
ISBN: 9781337794909

#### Solutions

Chapter
Section
Chapter 4, Problem 4RQ
Textbook Problem

## At sea level, the normal percentage of carbon dioxide (CO2) in the atmosphere isA. 5%B. 40%C. 78%D. 0.03%

Expert Solution
Summary Introduction

Introduction:

The percentage of carbon dioxide in the atmosphere is defined as the amount of carbon dioxide present in the mixture of gases present in the atmosphere. There are two gases that account for most of the concentration in the atmosphere: nitrogen and oxygen. They are followed by argon, carbon dioxide, and other trace gases.

### Explanation of Solution

Justification/ Explanation for the correct answer:

Option (D) is 0.03%. The atmospheric concentration of each gas in the atmosphere varies. This percentage remains the same at and above sea level. This means that there is no major change in the percentage of a gas present in a mixture on increasing the altitude. The atmospheric percentage of carbon dioxide is 0.03%. The gas with the highest percentage is nitrogen (78%), followed by oxygen (21%). Hence, option (D) is correct.

Option (A) is 5 percent. The value of the normal percentage of carbon dioxide in the atmosphere is not 5%...

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