When you fill a soccer ball with air. You increase the number of air molecules in the ball, which results in.. A. More collisions
B. More pressure
C Both

C. Both

Explanation:

If a soccer ball is filled with air the molecules are more tightly packed together causing more pressure and more collisions. So C. Both is the answer.

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.