True or false. a bond between a metal atom and a nonmetal atom is likely an iconic bond

Describe the interaction that occurs between two objects with the same electrical charge.

Calculate the number of moles of ethane in 100 grams

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?