When carbon an oxygen combine chemically, the mass of the product

The correct answer is option (2).

Explanation:

According to Law of Conservation of Mass , mass can neither be created nor be destroyed.

In a balanced chemical equation of reaction , the mass of the reactant is always equal to the mass of the products. As we can observe this law in the chemical reaction between carbon and oxygen.

Total mass of reactant = 12 g/mol + 32 g/mol = 44 g/mol

Total mass of products = (12 g/mol + 2 × (16 g/mol)) = 44 g/mol

Since,the law of conservation of mass is justified by the above reaction .Hence ,the correct answer is option (2).

  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-

i belive it is water