Which of the following equations is balanced correctly?
a.
3 h2o → h2 + 3 o2

b.
2 c3h3 + o2 → 2 co2 + h2o

c.
2 c2h2 + 5 o2 → 4 co2 + 2 h2o

d.
cl2 + 2 kbr → kcl + br2

hey your not cool]      

h

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.

it should be all of them because it asks if you included all of those in your answer

explanation: