Department of Energy Argonne National Laboratory Office of Science NEWTON's Homepage NEWTON's Homepage
NEWTON, Ask A Scientist!
NEWTON Home Page NEWTON Teachers Visit Our Archives Ask A Question How To Ask A Question Question of the Week Our Expert Scientists Volunteer at NEWTON! Frequently Asked Questions Referencing NEWTON About NEWTON About Ask A Scientist Education At Argonne Air - Light or heavy
Name: N/A
Status: N/A
Age: N/A
Location: N/A
Country: N/A
Date: N/A

What is the weight of air?

Air is composed of about 80% nitrogen (molecular weight is 28 g/mole) and about 20 % oxygen (molecular weight is 32 g/mole). The approximate weight of air is then (0.8 * 28) + (0.2 * 32) = 28.8 g/mole. One mole of a gas at standard temperature and pressure (0 degrees and 1 atmosphere) occupies about 22.4 liters. Thus air weighs about 1.3 grams per liter.


Click here to return to the Physics Archives

NEWTON is an electronic community for Science, Math, and Computer Science K-12 Educators, sponsored and operated by Argonne National Laboratory's Educational Programs, Andrew Skipor, Ph.D., Head of Educational Programs.

For assistance with NEWTON contact a System Operator (, or at Argonne's Educational Programs

Educational Programs
Building 360
9700 S. Cass Ave.
Argonne, Illinois
60439-4845, USA
Update: June 2012
Weclome To Newton

Argonne National Laboratory