Which change would most likely increase the rate of a chemical reaction

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.

Avariable that is not being directly tested during an experiment should be

State one important difference between a physical change and a chemical change?