All but one statement below tell why scientists work in groups A. Mark only one oval.
problems are complex
B. research progress takes a lot of time and money
C. some scientists are lazy and steal the ideas of others
D. research progress occurs in small steps, so many people are needed

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.