In a metal lattice, the metal ions are and they are .

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?

What information does a complete ionic equation give that the balanced equation doesn’t show?

How is the way a mixture is combined different from how a compound is combined?