An electrochemical cell has the following standard cell notation.

mg(s) | mg^2+ (aq) || aq^+(aq) | aq(s)

what is the standard potential for the cell?

is this a spontaneous or non spontaneous reaction? explain your answer.

is this a galvanic cell or an electrolytic cell? explain your answer.

The cell notation is:

here in cell notation the left side represent the anodic half cell where right side represents the cathodic half cell

in anodic half cell : oxidation takes place [loss of electrons]

in cathodic half cell: reduction takes place [gain of electrons]

1) this is a galvanic cell

2) the standard potential of cell will be obtained by subtracting the standard reduction potential of anode from cathode

Therefore

3) as the value of emf is positive the reaction will be spontaneous as the free energy change of reaction will be negative

Δ

As reaction is spontaneous and there will be conversion of chemical energy to electrical energy it is a galvanic cell.

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.

if you're asking what comes out, it's steam.