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. Air is not pure substance. Air has all dust and dangerous gases with it. From place to place its composition changes.
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.
Natural air is always a mixture, and more or less homogenous in its major constituents. However, if the balloon was inflated by mouth, it will have less oxygen and more carbon dioxide than the air outside the balloon, which is also a mixture.