Air Flashcards
What are the major gaseous constituents of air?
Nitrogen, oxygen, water vapor, carbon dioxide, and noble gases (argon and neon).
What is the approximate percentage of nitrogen in air?
About 78%.
What is the approximate percentage of oxygen in air?
About 21%.
What is the approximate percentage of argon in air?
About 0.93%.
What is the approximate percentage of carbon dioxide in air?
About 0.04%.
What is the role of water vapor in the air?
Water vapor is responsible for humidity and can vary in concentration.
What is the approximate percentage of neon in air?
About 0.0018%.
Why is air considered a mixture rather than a compound?
Air is considered a mixture because its components (gases) retain their individual properties and can be separated by physical methods.
What principle is involved in the separation of air components?
The principle of fractional distillation, where components are separated based on their boiling points.
What are some uses of nitrogen?
Nitrogen is used in industrial processes, as an inert atmosphere for chemical reactions, and in refrigeration.
What are some uses of oxygen?
Oxygen is used in respiration, medical treatments, and as an oxidizer in combustion processes.
Why does the composition of air vary in different environments?
The composition of air can vary due to factors such as altitude, pollution, humidity, and local sources of emissions.
What are some uses of argon?
Argon is used in inert gas welding, as a protective gas in metal production, and in lighting.
What are some uses of neon?
Neon is used in neon signs, high-voltage indicators, and as a refrigerant in some applications.
