The diagram below reresents constructive:

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 is the indicator of the number of ions in solution? the amount of conductivity the amount of precipitate the amount of solute added

How many moles are in 7.2 x 10^23 carbon molecules?