I need help with the second colum, can somebody help. So you have to use the -40 and convert to Celsius. then convert again to kelvin.

how to make a simple air condition

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.

put the answers   and i could answer.

i would say b

explanation:

but i think i would need more information than that