Air is a mixture.
Answer a. Pure Water is not a mixture - it is a compound. Seawater is a mixture of water and salts, air is a mixture of gases and brass is a mixture (an alloy) of copper and zinc metals.
Pure substances are made up of a single element, or a single compound. Table salt is a pure substance because it is made up of only the compound NaCl (sodium chloride). Diamond is a pure substance, it is made up of the element carbon. Air is not a pure substance, it is a mixture of several gaseous elements and compounds (nitrogen, oxygen, carbon dioxide..) Distilled water is a pure substance made up of a single compound H2O.
Difusion in air. Osmosis in water.
A homogenous mixture is a mixture of substance where the substance is so evenly mixed you cannot see the different parts that make it up. Some examples, of a homogenous mixture could be table salt and table sugar. However, some mixtures can also be gases or liquids. Brass and the air we breathe are also some examples. :)
Air is a mixture, made mostly of the elements nitrogen and oxygen. It also has some other gases, such as argon (element), carbon dioxide (compound), and water (compound).
Air is a mixture.
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.
No. To start with, air is not a pure substance, and mixiong it with something else just makes it worse.
Air is a mixture of gases, primarily nitrogen, oxygen, and trace amounts of other gases like carbon dioxide and noble gases. Therefore, it is not a pure substance as it is composed of multiple elements.
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 cloud is a mixture of water vapor and dust(ground)
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.
The question looks strange and weird,but this what i can say,a mixture can never be pure,a pure substance can never be a mixture,though we can talk about ,like,pure air or something,but that is not in the strict chemical sense.
CO2 is a pure substance and so is homogeneous. Hint: if it has a chemical formula then it is a pure substance.
Air is a mixture of several gases, most notably nitrogen, oxygen, and some trace gases (eg, argon).
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 isn't a pure substance, it is a mixture of a bunch of other gases mainly Nitrogen and Oxygen with small amounts of other gases.