How many covalent bonds are there in one molecule of carbon dioxide, co2?

The answer is 4. The 4 covalent bonds are basically 2 double bonds, where two pairs of electrons are shared. CO2 involves sp2 hybridization since each of the 4 valence electrons of the carbon are involved in the covalent bonds. Each oxygen, the other hand, has two lone pairs of the electrons, each (which form a pi bond).

  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 answer is 0.8m.

by: nicholas