A(n) ________________________ is the combination of two or more substances that are not chemically bound to one another.

exothermic

distillation

endothermic

compound

mixture

mixture

A mixture is the combination of two or more substances that are not chemically bound to one another.

A compound is the combination of two or more substances that are not chemically bound to one another. To determine the answer to this question, you can use your knowledge of basic chemistry concepts. Understanding the definitions of the terms given in the options will help you identify the correct answer.

Exothermic and endothermic are terms used to describe energy changes in chemical reactions, not combinations of substances.

Distillation is a process used to separate components of a mixture based on differences in boiling points. It is not a term used to describe the combination of substances.

A mixture, on the other hand, describes a combination of substances that are not chemically bound. It is a physical combination where each substance retains its own properties and can be separated by physical means.

Therefore, the correct answer is "mixture."