Mechanical Engineering Exam > Mechanical Engineering Questions > The percentage O2 by weight and by volume in ...
Start Learning for Free
The percentage O2 by weight and by volume in atmospheric air is
- a)21% and 23% respectively
- b)23% and 21% respectively
- c)23% and 23% respectively
- d)21% and 21% respectively
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
The percentage O2 by weight and by volume in atmospheric air isa)21% a...
Most Upvoted Answer
The percentage O2 by weight and by volume in atmospheric air isa)21% a...
Percentage of O2 in atmospheric air
The percentage of oxygen (O2) in atmospheric air is commonly measured by weight and volume.
- By weight: This refers to the amount of oxygen present in the air compared to the total weight of the air sample.
- By volume: This refers to the amount of oxygen present in the air compared to the total volume of the air sample.
Determining the percentage of O2 by weight
To calculate the percentage of oxygen in atmospheric air by weight, we need to know the molecular weight of oxygen and the molecular weight of air.
The molecular weight of oxygen (O2) is 32 g/mol, as each oxygen molecule has an atomic weight of 16 g/mol.
The molecular weight of air is a mixture of various gases, including nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and trace amounts of other gases. The average molecular weight of air is approximately 28.97 g/mol.
To determine the percentage of O2 by weight, we can use the following formula:
Percentage of O2 by weight = (Molecular weight of O2 / Molecular weight of air) * 100
Percentage of O2 by weight = (32 g/mol / 28.97 g/mol) * 100 ≈ 110.57%
Therefore, the percentage of O2 in atmospheric air by weight is approximately 110.57%.
Determining the percentage of O2 by volume
To calculate the percentage of oxygen in atmospheric air by volume, we need to know the volume fraction of oxygen in air.
The volume fraction of oxygen in air is approximately 20.95%, which can be rounded to 21%.
Therefore, the percentage of O2 in atmospheric air by volume is approximately 21%.
Conclusion
Based on the calculations, the correct option is B) 23% and 21% respectively. The percentage of O2 in atmospheric air is approximately 23% by weight and 21% by volume.
The percentage of oxygen (O2) in atmospheric air is commonly measured by weight and volume.
- By weight: This refers to the amount of oxygen present in the air compared to the total weight of the air sample.
- By volume: This refers to the amount of oxygen present in the air compared to the total volume of the air sample.
Determining the percentage of O2 by weight
To calculate the percentage of oxygen in atmospheric air by weight, we need to know the molecular weight of oxygen and the molecular weight of air.
The molecular weight of oxygen (O2) is 32 g/mol, as each oxygen molecule has an atomic weight of 16 g/mol.
The molecular weight of air is a mixture of various gases, including nitrogen (N2), oxygen (O2), carbon dioxide (CO2), and trace amounts of other gases. The average molecular weight of air is approximately 28.97 g/mol.
To determine the percentage of O2 by weight, we can use the following formula:
Percentage of O2 by weight = (Molecular weight of O2 / Molecular weight of air) * 100
Percentage of O2 by weight = (32 g/mol / 28.97 g/mol) * 100 ≈ 110.57%
Therefore, the percentage of O2 in atmospheric air by weight is approximately 110.57%.
Determining the percentage of O2 by volume
To calculate the percentage of oxygen in atmospheric air by volume, we need to know the volume fraction of oxygen in air.
The volume fraction of oxygen in air is approximately 20.95%, which can be rounded to 21%.
Therefore, the percentage of O2 in atmospheric air by volume is approximately 21%.
Conclusion
Based on the calculations, the correct option is B) 23% and 21% respectively. The percentage of O2 in atmospheric air is approximately 23% by weight and 21% by volume.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Similar Mechanical Engineering Doubts
Top Courses for Mechanical EngineeringView all
The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer?
Question Description
The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer?.
The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer?.
Solutions for The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice The percentage O2 by weight and by volume in atmospheric air isa)21% and 23% respectivelyb)23% and 21% respectivelyc)23% and 23% respectivelyd)21% and 21% respectivelyCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup