What is the composition of air?

Phases of Matter and Intensive Properties Read more from
Chapter MacRoscopic Properties: The World We See

Earth’s atmosphere is made up of 78% nitrogen (N2) and 21% oxygen (O2), if you ignore water vapor, which shifts too much to include in averages for the entire planet. The last 1% is made up of mostly argon (Ar), followed by carbon dioxide (CO2) and other trace gases.


This is a web preview of the "The Handy Chemistry Answer Book" app. Many features only work on your mobile device. If you like what you see, we hope you will consider buying. Get the App