Gas is defined as O a. the form of matter that is easily compressible and will fit into a container of almost any size and shape. O b. the form of matter that is relatively incompressible and has a fixed volume but no fixed shape. O C. a material that can be separated by physical means into two or more substances. O d. a substance composed of two or more elements chemically combined. O e. the form of matter characterized by rigidity, and is relatively incompressible and has fixed shape and volume.
States of Matter
The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates).
Chemical Reactions and Equations
When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.


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