An example of a pure substance in liquid form is water (H2O). A pure substance is a type of matter that has fixed chemical composition, whether it is a single element or a compound. Two or more phases of a pure substance is still considered as a pure substance as long as the chemical composition of it is the same. For example, iced water is considered a pure substance since ice is only water in its solid form.
Phases of Matter
There are three principal phases of matter: solid, liquid, and gas. A phase is the constant molecular arrangement of a homogeneous substance throughout, or simply means the physical form of the matter.
1. Solid
It has a fixed shape and does not conform to a container.
The molecules are closely packed or compacted together.
It looks rigid and resistant to force when applied.
Examples: Iron, Book, and Cellphone
2. Liquid
The shape of this phase follows the shape of the container.
Its molecular particles lie close to each other but looser than the solid’s particles.
It does not have a fixed form.
Examples: Water, Blood, and Alcohol
3. Gas
Like liquid, its shape depends on the container but it also fulfills it.
The molecular particles of it have large distances between each other.
The particles move freely and collide with each other.
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Answer:
Pure Substance
An example of a pure substance in liquid form is water (H2O). A pure substance is a type of matter that has fixed chemical composition, whether it is a single element or a compound. Two or more phases of a pure substance is still considered as a pure substance as long as the chemical composition of it is the same. For example, iced water is considered a pure substance since ice is only water in its solid form.
Phases of Matter
There are three principal phases of matter: solid, liquid, and gas. A phase is the constant molecular arrangement of a homogeneous substance throughout, or simply means the physical form of the matter.
1. Solid
It has a fixed shape and does not conform to a container.
The molecules are closely packed or compacted together.
It looks rigid and resistant to force when applied.
Examples: Iron, Book, and Cellphone
2. Liquid
The shape of this phase follows the shape of the container.
Its molecular particles lie close to each other but looser than the solid’s particles.
It does not have a fixed form.
Examples: Water, Blood, and Alcohol
3. Gas
Like liquid, its shape depends on the container but it also fulfills it.
The molecular particles of it have large distances between each other.
The particles move freely and collide with each other.
Examples: Helium, Oxygen Gas, and Nitrogen Gas
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