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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.
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∙ 11y ago
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Why is air a pure substance?
Air is not a pure substance.
Is gas homogeneous heterogeneous or a pure substance?
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.
A pure substance is the what throughout?
A pure substance is the same throughout. When a substance is 100% something it is pure.
Why silicon is a pure substance?
silicon is a pure substance because it is an element and as we know an element is a pure substance
Is sulfur a pure substance?
pure substance
Why is air a pure substance?
Air is not a pure substance.
Is air an example of pure substance?
No. Air is not pure substance. Air has all dust and dangerous gases with it. From place to place its composition changes.
Is air are pure substance?
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.
Is liquid plus air a pure substance?
No. To start with, air is not a pure substance, and mixiong it with something else just makes it worse.
Is clean air a mixture or a pure substance?
Air is a mixture.
Is clean air a pure substance or a mixture?
Air is a mixture.
Is air or nitorgen 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.
Is Air (Nitrogen and Oxygen) 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.
Is acetone a pure substance or mixture?
pure substance, propanone
Is gas homogeneous heterogeneous or a pure substance?
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.
Is a lemon a pure substance?
it is a pure substance.... not
Is a tin a pure substance?
Pure substance
