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The Chemical Composition of Air - ThoughtCo
https://www.thoughtco.com/chemical-composition-of-air-604288
WEBApr 4, 2022 · The primary component of air is nitrogen gas. Nitrogen, oxygen, water vapor, argon, and carbon dioxide account for about 99% of the composition of air. Trace gases include neon, methane, helium, krypton, hydrogen, xenon, ozone, and many other elements and compounds.
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Atmosphere of Earth - Wikipedia
https://en.wikipedia.org/wiki/Atmosphere_of_Earth
WEBAs of 2023, by mole fraction (i.e., by number of molecules), dry air contains 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. [8] Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.
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Air | Composition, Oxygen, Nitrogen | Britannica
https://www.britannica.com/science/air
WEBMar 21, 2024 · Air, mixture of gases comprising the Earth’s atmosphere. The mixture contains a group of gases of nearly constant concentrations and a group with concentrations that are variable in both space and time. The atmospheric gases of steady concentration (and their proportions in percentage by volume)
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Chemical Composition of Air - Science Notes and Projects
https://sciencenotes.org/chemical-composition-air/
WEBFeb 1, 2021 · About 99% of the composition of air consists of nitrogen, oxygen, and argon. Water vapor (variable) and carbon dioxide are the main trace gases. 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.
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3.1: Structure and Composition of the Atmosphere
https://chem.libretexts.org/Bookshelves/Environmental_Chemistry/Geochemistry_(Lower)/03%3A_The_Atmosphere/3.01%3A_Structure_and_Composition_of_the_Atmosphere
WEBJan 21, 2023 · Composition of the atmosphere. Table 1: Major components. Table 2: Minor components. Table 3:Trace components. Ozone.
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Air - National Geographic Society
https://www.nationalgeographic.org/encyclopedia/air/
WEBOct 19, 2023 · Air is the invisible mixture of gases that surrounds Earth.Air contains important substances, such as oxygen and nitrogen, that most species need to survive.Human beings (Homo sapiens), of course, are one of those species.Sometimes, the word "atmosphere" is used instead of the word "air."Standard Dry Air is the …
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Earth's atmosphere (article) | Khan Academy
https://www.khanacademy.org/science/ap-college-environmental-science/x0b0e430a38ebd23f:earth-systems-and-resources/x0b0e430a38ebd23f:earths-air-and-water/a/earth-s-atmosphere
WEBconsisting of water vapor, argon, carbon dioxide, and small amounts of other gases. Earth’s atmosphere consists of five distinct layers that are distinguished by temperature gradients—the layers alternate between having temperatures that increase or …
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16.3: The Air We Breathe - Chemistry LibreTexts
https://chem.libretexts.org/Courses/Anoka-Ramsey_Community_College/Introduction_to_Chemistry/16%3A_Environmental_Chemistry/16.03%3A_The_Air_We_Breathe
WEBApr 20, 2023 · Understand the composition of the air. Know the relative reactivities of the major components of air.
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What's in the Air? | Center for Science Education
https://scied.ucar.edu/learning-zone/air-quality/whats-in-the-air
WEBThe dry composition of the atmosphere is mostly nitrogen and oxygen. It also contains fractional amounts of argon and carbon dioxide and trace amounts of other gases, such as helium, neon, methane, krypton, and hydrogen (NASA). UCAR. Gases. The most abundant naturally occurring gas is nitrogen (N 2 ), which makes up about 78% of air.
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The Atmosphere | National Oceanic and Atmospheric Administration
https://www.noaa.gov/jetstream/atmosphere
WEBJul 28, 2023 · Introduction to the Atmosphere. The atmosphere is a layer of gas and suspended solids extending from the Earth's surface up many thousands of miles, becoming increasingly thinner with distance but always held by the Earth's gravitational pull.
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