How will you detect the evolution of hydrogen gas in reaction between a metal and acid?

Energy defines the different "states" of matter. in no more than 3 sentences, describe the amount of kinetic energy that each of the 3 states of matter possesses and relate that to the atom/molecular motion of each "state".

Identify the lewis base in this balanced equation: fe3+ h2o fe(h2o)63+

What methods could you use to solubilize calcium carbonate