You run a chromatogram of inks belonging to 3 crime suspects and from a ransom note. The ink resolves into the following numbers of spots: suspect A= 2, suspect B= 4, suspect C= 3, note= 2. Which suspect would you most likely bring in for questioning?

A

Explanation:

Both suspect A and the note has the same number of spots.

  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-

answer; talc and gypsum;