Physical or Chemical Changes Gallium melting into its liquid form (at 30°C) is an example of a
Type text here.
change, where some
properties of a material change, but the composition of the material
does not change. Physical changes can be described as reversible or
irreversible, with matter state changes being an example of a(n)
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physical change.

1. physical 2. Reversible

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.

2b2t

explanation:

2b2t