Question

what is gas? ............​

Answer 1

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Gas is defined as an air-like substance that expands to fill the space it is in. It also refers to a substance used as fuel. An example of gas is helium. An example of gas is the fuel you put in your car to get it to move.

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Answer 2

Answer:

Gas is one of the four fundamental states of matter. A pure gas may be made up of individual atoms, elemental molecules made from one type of atom, or compound molecules made from a variety of atoms. A gas mixture, such as air, contains a variety of pure gases