Use the periodic table to match each of the following element symbols to its name, atomic mass, or atomic number. (3 points)
Sn
[Choose ]
Se
[Choose ]
S
[ Choose ]

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.

thats a little if u want the answer just look it up on google thats what i do haha : )

l dont know l am s sorry

we need the questions , i may then you.