sing the volumes of sodium thiosulfate solution you just entered, the mass of bleach sample, and theaverage molarity of the sodium thiosulfate solution entered earlier, calculate the mass percent of NaClO foreach bleach sample. Enter the calculated mass percent of NaClO in each of the 3 acceptable trials. Be sure to enter your masspercent values in the corresponding order that you entered your masses of your bleach samples andvolumes of your sodium thiosulfate previously.

  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-

elements make up everything, and they combine to make compounds.

the answer is c