Amountain climber ascends a mountain to its peak. the peak is 12,740 ft avove sea level. the climber then decends 200 ft to meet a fellow climber. find the climber's elevation above sea level after meeting the other climber

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?