Which of the following is a pure substance and why? (1 point)

Question

Responses

Salad because its parts are easily separated.
Salad because its parts are easily separated.

Smoothies because they have several different parts.
Smoothies because they have several different parts.

Apple juice because it is only one color.
Apple juice because it is only one color.

Water because it is only made of water molecules.
Water because it is only made of water molecules.

Answer 1

The correct response is:

Water because it is only made of water molecules.

A pure substance is defined as a material that has a constant composition and consistent properties throughout. Water is a pure substance because it is composed solely of water molecules (H2O) and does not contain any other substances or mixtures. In contrast, salad and smoothies are mixtures of different components, and apple juice, while it may appear uniform, can contain other substances and impurities, making it not a pure substance.