What are volatile organic compounds (VOCs)?

Nov 6, 2019 ... The most abundant gas in the Earth's atmosphere is nitrogen, which accounts for about 78% of the mass of dry air. The most abundant gas on Venus is carbon dioxide (CO2), which accounts for 96% of the atmosphere. The second most common gas is nitrogen. The predominance ... Apr 17, 2025 ... Nitrogen makes up about 78% of Earth's atmosphere and Argon is the third most abundant gas (1%) in Earth's atmosphere, after oxygen (21%). Nitrogen is the most abundant in the atmosphere amounting to about 78%. The seconds most abundant is oxygen at approximately 21%. Apr 17, 2025 ... Nitrogen makes up about 78% of Earth's atmosphere and Argon is the third most abundant gas (1%) in Earth's atmosphere, after oxygen (21%). The air we breathe is actually a combination of several gases. · The most significant constituent, Nitrogen, is held at a constant level through the nitrogen ... Nov 2, 2010 ... Molecular oxygen (O2) is the second most abundant gas in the Earth's atmosphere, but in many natural environments, its concentration is ... Composition of gases in the air. Figure caption,. The composition of the modern atmosphere. Question. Name the most abundant gas in the modern atmosphere. Show ... Argon is the most abundant noble gas in the atmosphere, because most of it was produced by a way lived radio isotope of Potassium in the earth crust. The atmosphere is the layer of gases that envelopes a planet. Surprisingly, oxygen isn't the most abundant gas in our planet's atmosphere.