Which answer below correctly identifies the type of change and the explanation for the change in calcium carbonate?

physical change because even though a state change was observed, the calcium carbonate retained its original properties

physical change because even though a particle size change was observed, the calcium carbonate retained its original properties and was not transformed into a new substance

chemical change because a state change was observed, which indicated that the calcium carbonate was transformed into a different substance

chemical change because a particle size change was observed, which indicated that the calcium carbonate was transformed into a different substance

B (The Second Option)

Explanation:

Physical Change because even though a particle size change was observed, the calcium carbonate retained its original properties and was not transformed into a new substance.

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation:

  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-