Here's why:
* Mixture: It's a combination of two or more substances that are not chemically bonded. The substances in a mixture retain their individual properties.
* Homogeneous: The mixture has a uniform composition throughout. This means the substances are evenly distributed, and it's impossible to distinguish the individual components with the naked eye.
Examples of homogeneous mixtures:
* Saltwater: Salt dissolves evenly in water, creating a single-looking liquid.
* Air: A mixture of gases like nitrogen, oxygen, and carbon dioxide, but appears as a single gas.
* Sugar in coffee: When sugar dissolves in coffee, it creates a uniform brown liquid.
Key difference from a pure substance:
* Pure Substance: A substance made up of only one type of molecule or atom. It has a fixed composition and cannot be separated into simpler substances by physical means. Examples include water (H₂O) and gold (Au).
