Which of the following is a balanced equation?

Select one:
a. A
b. B
c. C
d. D

so A

Explanation:

balanced chemical equation occurs when the number of the different atoms of elements in the reactants side is equal to that of the products side. Balancing chemical equations is a process of trial and error

D

Explanation:

KClO3 ==> KCl + O2

         1  K  1

         1  Cl  1

         3  O  2

There are a different amount of oxygen atoms so this equation is not balanced

KClO3 ==> 3KCl + O2

        1  K  3

        1  Cl 3

         3 O 2

None of the elements have the same number of atoms on either side of the equation therefore this equation is not balanced.

2KClO3 ==> KCl + 3O2

          2  K   1

          2  Cl  1

          6  O   6

The number of potassium atoms and chlorine atoms is different on both sides of the equation therefore this equation is not balanced.

2KClO3 ==> 2KCl + 3O2

          2  K   2

          2  Cl  2

          6  O   6

The number of atoms of each element are the same on both sides therefore this equation is balanced.

the atomic number will stay the same no matter how many electrons it has, so it doesn’t decrease nor increase. it’ll only change with a different number of protons

can you list the answers so i can answer