I don't think so. Our noses and our mouths have bacteria in them regardless of how many times we clean them; so when we exhale air, that bacteria must be going into the air as well.
Air is considered a pure substance because it is a homogeneous mixture of gases, mainly nitrogen, oxygen, carbon dioxide, and trace amounts of other gases. Each component of air retains its unique chemical properties and cannot be separated by physical means without changing the composition of air.
Pure air consists of a mixture of gases like nitrogen, oxygen, carbon dioxide, and others, so it is not considered a pure substance. However, if the air is free from pollutants like chemicals or particulate matter, it would be considered clean and unpolluted.
It depends. You can have a gaseous mixture such as air, which would be a homogeneous mixture. But a single gas such as oxygen or methane would be a pure substance.
Gold is a pure substance (element), water is a compound, steel is an alloy, and air is a mixture of gases.
It is a pure substance as well as a compound
No. Air is not pure substance. Air has all dust and dangerous gases with it. From place to place its composition changes.
As per my knowledge pure substance does not have anything else added to it. Air and water are pure substances that exist in nature. A pure substance cannot be taken apart to locate more substances.
No. To start with, air is not a pure substance, and mixiong it with something else just makes it worse.
Air is a mixture.
Air is considered a pure substance because it is a homogeneous mixture of gases, mainly nitrogen, oxygen, carbon dioxide, and trace amounts of other gases. Each component of air retains its unique chemical properties and cannot be separated by physical means without changing the composition of air.
Air is a mixture.
Air is a mixture of gasses, about 78% nitrogen, 21% oxygen and then a dash of others. Nitrogen OTOH is one of the elements out of the periodic table, which I guess is what you mean with a pure substance.
Air is a mixture of gasses, about 78% nitrogen, 21% oxygen and then a dash of others. Nitrogen OTOH is one of the elements out of the Periodic Table, which I guess is what you mean with a pure substance.
pure substance, propanone
it is a pure substance.... not
Pure substance
Methane is a pure substance.