Question

Question #b68a8

Answer 1

Mixture: two or more substances.

Explanation:

In the classification of matters, we can distinguish two groups:
Mixture and pure substance.

A mixture is formed when two or more pure substances are mixed together.

For example:
Water is a pure substance. Sodium chloride `NaCl` is a pure substance.

When `NaCl` is dissolved in water the form a homogeneous mixture . We say homogeneous mixture because we can see only one phase.

Water and sand form another mixture which is called heterogeneous mixture . We say Heterogeneous because we can see two distinct phase the water and sand.

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Answer 2

Substances have a fixed composition; mixtures have a variable composition.

Explanation:

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