Reaction 1:V2+(aq)+2e−→V(s)E°=−1.18V Reaction 2:Pb2+(aq)+2e−→Pb(s)E°=−0.13V
Net Reaction:V(s)+Pb2+(aq)→Pb(s)+V2+(aq )

The vanadium-lead galvanic cell in the diagram above initially operates under standard conditions according to the net reaction shown in the table below the diagram. The cell operates for 1.0 minute at a constant known current. Which of the following mathematical relationships would be most useful for determining the change in mass of the V(s) electrode after 1.0 minute of the cell's operation without having to use a balance?

A.) Ecell=E°cell−(RT/nF)lnQ.
B.) I=q/t
C.) ΔG°=−nFE°
D.) ΔG°=ΔH°−TΔS°

k

explanation:

k

1.43 x 10^-11 j the guy commented the awnser just making sure u see it .

it can be observed without changing the identity of the object.

it depends on what substance you're talking about as well as many other factors. in quantum mechanics, the observation of particles affects the observers ability to measure certain properties. for example: you can know the velocity of a particle, but you can't know it's position; or you can know it's position, but not it's velocity. it's like trying to find out where a grain of sand is by throwing other grains of sand at it. once you find out where it is, it's been moved. it's also like trying to find an answer to the question of whether or not a tree falling in a forest makes a sound if nobody is there to hear it. paradoxically, the only way to find out is to be there and hear it.