Imagine a drop of water hanging from your finger. how is this similar to the water staying together after the balloon is popped

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?

At element makes up all organic compounds?

372 ml is the volume of aluminum, density is 2.70 g/ml what is the mass in grams