ASAP WILL GET BRAINLIEST IF CORRECT The table shows the number of reactants and products present during two separate chenmical reactions.
Chemical Change Comparison
Chemical Reaction Reactants Products
3
B
2
1
Which of the following statements correctly identifies the synthesis reaction and describes a substance involved?
O Chemical reaction A, because the reactant is a compound
O Chemical reaction B, because the product is a compound
O Chemical reaction A, because the reactant is an element
O Chemical reaction B, because the product is an element

O Chemical reaction A, because the reactant is an element:

  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-