20 po What is the mass of an Atom that has 8 Protons 7 Neutrons and 8
Electrons (HINT: add up the two that contribute to the mass) *
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iron and sleel

make siroeel

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.