How do an alligator’s eyes it survive?

Which factor is likely to impact the possible number of compounds ?

Complete each row of the table below by filling in the missing prefix or missing exponent.

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?