The energy that a log has is transformed when burned. how does the chemical energy of the log compare to the heat and light energy it is transformed into?

the amount of chemical energy is equal to the amount of heat and light energy.

the amount of chemical energy is less than the amount of heat and light energy.

the amount of chemical energy is more than the amount of heat and light energy.

there is no way to know.

  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-

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.