John wants to measure the impact the amount of baking soda has on the explosion level in a baking soda and vinegar volcano. He places 20ml of
vinegar inside a volcano and then adds 1 tablespoon of baking soda. He
measures the amount of liquid that explodes from the volcano. Next, he
cleans the volcano and then repeats the experiment, but this time he adds
20ml of vinegar inside the volcano and adds 2 tablespoons of baking soda.
He once again measures the amount of liquid that explodes from the
volcano.
A. What is the independent variable:

B. What is the dependent variable:

C. What are three constants from the experiment:

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

alchemy hadn't scientific methods of study, appeal to mysticism and fantasy, the knowledge of chemistry and physics were modest at that time.

alchemy was - but as new rules were discovered it either changed into chemistry or it became "unscientific".