When the equation kcio3(s)> kci(s)+o2(g) is balanced, the coefficient of kcio3 is what?

The coefficient of is 2

Explanation:

The Balanced Chemical equation is :

This reaction is balanced because total number of atoms of different elements in reactant is equal to total number of atoms in products.

Reactant : 2

Number of K atoms = (2)1 = 2

Number of Cl atoms = (2)1 = 2

Number of O atoms = (2)3 = 6

Product : 2 KCl and 3

In KCl

Number of K atoms = (2)1 = 2

Number of Cl atoms = (2)1 = 2

In  

Number of O atoms = (3)2 = 6

So ,

this equation is balanced and follow Law of Conservation of Mass because :

Number of K atom  in reactant = product = 2

Number of Cl atom  in reactant = product = 2

Number of O atom  in reactant = product = 6

chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. these processes are called chemical reactions and, in general, are not reversible except by further chemical reactions. some reactions produce heat and are called exothermic reactions and others may require heat to enable the reaction to occur, which are called endothermic reactions. understanding chemical changes is a major part of the science of chemistry.

c. 4.54 x 10–12 j happens to be correct