What can a drop of liquid mercury be described as? a pure substance and a compound
an impure substance that is reactive
an impure substance that is unreactive
a pure substance and an element

It’s a pure substance and an element

The answer to your question is c. mitochondria.

The surface of the water droplet is held together by the attraction between molecules. in order for water to flow more easily into these small spaces, you need to decrease its surface tension. you can do this by adding soap, which is a surfactant (a material that decreases the surface tension of a liquid).