A0.20 mol sample of mgcl2(s) and a 0.10 mol sample of kci(s) are dissolved in water and diluted to 500 ml. what is the concentration of cl in the solution?

(a) 0.15 m
(b) 0.30 m
(c) 0.50 m
(d) 0.60 m
(e) 1.0 m

The answer is E 1.0m i think right?

  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-