In 2007, the population of Canada was 1.26 % 10%, the population of Mexico was 10.6 x 107, the population of Brazil vas 13.6 x 107, and the population of China was 1.86
x 10%. Which two countries have the highest population?

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.