Consider the following intermediate chemical equations. ch4(g) + 2o2(g) → co2(g) + 2h2o(g) 2h2o(g) → 2h2o(1) which overall chemical equation is obtained by combining these intermediate equations? ch4(g)+2o2(g) → co2(g) + 2h2o(1) ch4(g) +202(g) → co2(g) + 2h2o(g) ch4(g) + 2o2(g) → co2(g) + 4h2o(g) + 2h2o(1) ch4(g) + 2o2(g) → co2(g) + 6h2o(g)

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l).

Explanation:

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g)

2H₂O(g) → 2H₂O(l)

CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(l).

  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-