Air is a mixture of several gases, where the two most dominant components in dry air are 21 vol% oxygen and 78 vol% nitrogen . Oxygen has a molar mass of 15.9994 g/mol and nitrogen has a molar …

Several layers can be distinguished in the atmosphere based on characteristics such as temperature and composition, namely the troposphere, stratosphere, mesosphere, thermosphere (formally the …

Jul 29, 2024 · Nearly all of Earth's atmosphere (air) is comprised of a mere five gases: nitrogen, oxygen, water vapor, argon, and carbon dioxide. Several other compounds are also present in our air in trace …

From largest to smallest, Earth’s atmosphere composition contains nitrogen, oxygen, argon, CO 2, and trace gases. Because water vapor is highly variable geographically, it’s excluded from this total.

Feb 10, 2026 · The current molecular composition of Earth’s atmosphere is diatomic nitrogen (N 2), 78.08 percent; diatomic oxygen (O 2), 20.95 percent; argon (A), 0.93 percent; water (H 2 0), about 0 …

Jul 2, 2024 · The atmosphere surrounds the Earth and holds the air we breathe; it protects us from outer space; and holds moisture (clouds), gases, and tiny particles. In short, the atmosphere is the …

4.1 Atmospheric Composition The major gases that comprise today's atmosphere are listed in the table below. In most studies of atmospheric composition, the volume mixing ratio is used to specify the …

Feb 1, 2021 · There is no chemical formula for air because the Earth’s atmosphere consists of a mixture of gases. Just three gases account for 99% of dry air: nitrogen, oxygen, and argon.

Air is a mixture of gases. Three elements make up over 99.9 percent of the composition of dry air: these are nitrogen, oxygen, and argon.

Jun 17, 2025 · It’s a carefully balanced blend, primarily consisting of nitrogen and oxygen, essential for life as we know it, but also including trace gases crucial for climate regulation and various other …