On a cold morning, the air pressure in the tires of an automobile measures 34 pounds per square inch. after several hours of high-speed driving, the pressure meas ures 38 pounds per square inch. (be sure your question is logical and your hypothesis is testable.)

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.