Question

which of the following examples is not considered a pure substance? a water molecule carbon fruit punch

Explanation:

A pure substance has a fixed - composition. A water molecule ($H_2O$) is a pure substance as it has a definite chemical formula. Carbon is an element and elements are pure substances. Fruit punch is a mixture of water, sugars, flavorings, and other substances, so it is not a pure substance.

Answer:

C. fruit punch