Here is my animation on how to balance a chemical equation. 

 

Website 1: https://www.thoughtco.com/how-to-balance-chemical-equations-603860 

“Thought Co.” gives a step by step tutorial on how to balance a chemical equation. This site uses descriptive steps and helpful pictures to teach this vital chemistry lesson.

 

 

Website 2: https://www.youtube.com/watch?v=2S6e11NBwiw 

This video explains the law of conservation of mass; the reason why all chemical reactions and equations must be balanced.

 

 

Journal: Moore, D. (2000, February). Chemical equations. Catalyst, 10(3), 8. 

This article gives an explanation on how to balance simple chemical equations.