If a burning candle is covered by a large glass beaker, the flame will go out. how does the beaker affect the conditions described by the fire triangle? a. it removes oxygen from the flame. b. it limits the heat available for the flame to continue to burn under the glass beaker. c. it prevents more oxygen from reaching the flame once the existing oxygen is used up. d. it limits the fuel available to the flame

  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-