What kind of evidence can you use to determine if a chemical reaction has occured?

Smog is the term used to describe the combination of fog and smoke

Why is soap used to remove grease? a. its nonpolar end dissolves the grease. b. it makes the water bond with the grease. c. it chemically bonds with the grease. d. its polar end dissolves the grease.correct answer for apex - a, its nonpolar end dissolves the grease.

What can be found in the ionosphere