Question

Which of the following is a balanced equation?

Select one:
a. A
b. B
c. C
d. D​

Answer 1

D

Step-by-step 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.