Is prepared instant coffee a mixture or substance?

Prepared instant coffee is a mixture. Here's why:

* Multiple components: Instant coffee is made by dissolving coffee powder in hot water. This means it contains at least two distinct substances: coffee solids and water.

* No chemical reaction: The process of dissolving the coffee powder in water doesn't create a new chemical compound. The coffee solids and water simply mix together.

* Separation: You can separate the components of prepared instant coffee. For example, you could evaporate the water and leave the coffee solids behind.

Therefore, prepared instant coffee is a mixture because it is composed of multiple substances that are not chemically bonded together.