Question

which of the following are mixtures? water, salt water, salt, air

Answer 1

A mixture is two or more substances which have been combined such that each substance retains its own chemical identity.

Answer 2

What do you think?

Answer 3

Salt water

Answer 4

Yes, salt water is a mixture as it is made up of salt (pure substance) and water (pure substance). Air is also a mixture as it is composed of multiple types of gases (nitrogen, oxygen, carbon dioxide, etc).