Which of these equations best summarizes photosynthesis?
A. C6H12O6 + 6 O2 → 6 CO2 + 6 H2O + Energy
B. C6H12O6 + 6 O2 → 6 CO2 + 12 H2O
C. 6 CO2 + 6 H2O → C6H12O6 + 6 O2
D. 6 CO2 + 6 O2 → C6H12O6 + 6 H2O
E. H2O → 2 H+ + 1/2 O2 + 2e-

C

Explanation:

                                              Sunlight

6 CO2       +          6 H2O   >            C6H12O6    +        6 O2

                                            Chlorophyll

Carbon(IV)oxide   Water                               Glucose              Oxygen

  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-

the ratio of the conjugate base to the acid required to attain the desired ph.