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Which of the following is not a mixture a. pure water b. seawater c. air d. brass?
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.
Give me some examples of pure substances in everyday life?
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.
Condition in which molecules of a substance are spread evenly throughout a space?
Difusion in air. Osmosis in water.
What are some examples of Homogenous mixture?
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. :)
Is air an element mixture or compound?
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).
Is clean air a mixture or a pure substance?
Air is a mixture.
Is clean unpolluted air is a pure substance?
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.
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 air not a pure substance?
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.
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.
Are clouds a mixture or pure substance?
a cloud is a mixture of water vapor and dust(ground)
Is helium inside a balloon a pure substance or mixture?
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.
How is a substances similar from 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.
Is carbon homogeneous substance?
CO2 is a pure substance and so is homogeneous. Hint: if it has a chemical formula then it is a pure substance.
Is air mixture or a pure substance?
Air is a mixture of several gases, most notably nitrogen, oxygen, and some trace gases (eg, argon).
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.
Why is air classed as a mixture?
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.
