Substance
A single kind of matter that is pure and has a specific set of properties.
Substance refers to a physical matter that has properties or characteristics that can be observed or measured. In other words, substance is any material that occupies space and has mass. Substance can be categorized as either pure substances or mixtures.
A pure substance is a type of substance that is made of only one kind of atom or molecule. Examples of pure substances include elements like gold, oxygen, and carbon dioxide. Pure substances have a fixed melting and boiling point, and their physical properties such as mass and volume do not depend on the amount of the substance present.
On the other hand, mixtures are substances made up of two or more pure substances that are combined physically but not chemically. Mixtures can be further classified as homogeneous mixtures or heterogeneous mixtures.
Homogeneous mixtures are those that have a uniform composition throughout the mixture. Examples of homogeneous mixtures include saltwater and air. In contrast, heterogeneous mixtures are those that have non-uniform composition, meaning that the different parts of the mixture can be distinguished. Examples of heterogeneous mixtures include blood and soil.
Overall, substance is an important concept in physics and chemistry, as it helps to understand the physical and chemical properties of the materials around us.
More Answers:
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