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

When the chemicals iron sulfide (fes) and hydrochloric acid (hcl) are combined, bubbles appear from the mixture. 1. does the appearance of bubbles indicate a physical or chemical change? 2. why do the bubbles indicate this change? 3. what property is this?