Is air a mixture of compounds or elements and...?

Question

I also need help distinguishing between an element and a compound. I've forgotten and need some help, thanks!

Additional Details

Ok.. but you didn't answer my question. Is it a mixture of compounds OR elements?

Answer 1

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Air id a mixture of elements....The difference b/w a compound and an element is:

An element is one atom, a group of atoms or molecules of the same basic structure such as Oxygen (O2), Hydrogen (H2), Lead (Pb).....

While a compound is made up of different elements that are chemically combined and can be defined by a chemical equation examples are:

Sulfuric Acid (H2SO4), Hydrochloric acid (HCl), Sodium Hydroxide (NaOH)

and finally a mixture is made up of several elements but the chemical compositions cannot be defined, hence equations cannot be derived for mixtures such as AIR...which contains Nitrogen (N2), Oxygen (O2), and other trace elements in varying proportions

Answer 2

yes it is my dear The Earth's atmosphere is a layer of gases surrounding the planet Earth and retained by the Earth's gravity. It contains roughly by molar content/volume 78.08% nitrogen, 20.95% oxygen, 0.93% argon, 0.038% carbon dioxide, trace amounts of other gases, and a variable amount average around 1% of water vapor. This mixture of gases is commonly known as air. The atmosphere protects life on Earth by absorbing ultraviolet solar radiation and reducing temperature extremes between day and night.

There is no definite boundary between the atmosphere and outer space. It slowly becomes thinner and fades into space. Three quarters of the atmosphere's mass is within 11 km of the planetary surface. In the United States, people who travel above an altitude of 80.5 km 50 statute miles are designated astronauts. An altitude of 120 km ~75 miles or 400,000 ft marks the boundary where atmospheric effects become noticeable during re-entry. The Kármán line, at 100 km 62 miles or 328,000 ft, is also frequently regarded as the boundary between atmosphere and outer space.

Answer 3

Air is a mixture of compounds and elements.


Elements are substances that cannot be separated into simpler substances. Salt is made up of the elements sodium and chloride. Water is made up of the elements hydrogen and oxygen.

The smallest particles of matter are called atoms. Remember the carrot from the other chapter. If you continue to chop a carrot into smaller and smaller pieces, eventually you would reach a point where you could not cut up the carrot anymore, but still have carrot. You would then have molecules of carrot. The same applies to elements. If you continually cut up a piece of aluminum, you will reach a point that you could no longer divide it. These are aluminum atoms. An atom is the smallest particle of an element that has the properties of that element. Some properties of aluminum are: shiny, silver colored, fragile, and thin. Each element has its own type of properties.

Chemists use symbols to represent elements. A symbol is a letter or picture used to represent something. Chemists use one or two letters to represent elements. The symbol for aluminum is Al. The symbol for oxygen is O.

A model of an oxygen molecule.

The symbol for oxygen is O. "O" stands for one atom of oxygen. Oxygen stoms are joined in pairs. To write a pair of oxygen atoms using symbols, we use the symbol O and the number 2. Oxygen would be (O2). The 2 is a subscript. "Sub" means "below". The 2 is written to the right of and below the O. A pair of oxygen atoms is a molecule of oxygen. A molecule is the smallest particle of a substance that exists independently. Molecules of most elements are made up of only one of atom of that element. Oxygen, along with nitrogen, hydrogen, and chlorine are made up of two atoms. Look at the model of oxygen above. The two balls represents the two oxygen molecules. The oxygen molecules are bonded or stuck together. We will learn about bonds later.

Compounds

A compound is a substance formed when two or more elements are chemically joined. Water, salt, and sugar are examples of compounds. When the elements are joined, the atoms lose their individual properties and have different properties from the elements they are composed of. A chemical formula is used a quick way to show the composition of compounds. Letters, numbers, and symbols are used to represent elements and the number of elements in each compound.

Mixtures

Mixtures are two or more substances that are mixed together but not chemically joined. A good example of a mixture is a salad. There are tomatoes, lettuce, cucumbers, and salad dressing all mixed together. No chemical reactions occur between the vegetables and the dressing. You can separate each of the vegetables from each other.

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Answer 4

k..... I m good @ this...

Air is a mixture of diff. compounds not elements...

Distiguish :
Compounds- It has minute particles as moleules.
Elements - Its minute Particles are atoms.

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Answer 5

Elements are substances that cannot be separated into simpler substances.
A compound is a substance formed when two or more elements are chemically joined.

Air is a mixture of gases, 78% nitrogen and 21% oxygen with traces of water vapor, carbon dioxide, argon, and various other components. So air is a compound that is made of elements