Calculate the standard potential, E ∘ , E°, for this reaction from its Δ G ∘ ΔG° value. X ( s ) + Y 4 + ( aq ) ⟶ X 4 + ( aq ) + Y ( s ) Δ G ∘ = − 48.0 kJ

The standard cell potential is 0.12 V.

We know that;

ΔG° = -nFE° cell

Where;

ΔG° = Standard free energy change

n = Number of moles of electrons = 4

F = Faraday's constant = 96500 C

E° cell = Standard cell potential

Making E° cell the subject of the formula;

E° cell = ΔG°/-nF

E° cell = − 48.0 × 10^3J/-(4  × 96500)

E° cell = 0.12 V

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0.124 V

Explanation:

To calculate standard Gibbs free energy, we use the equation:

Where,

n = number of electrons transferred = 4

F = Faradays constant = 96500 C

= standard cell potential = ?

Putting values in above equation, we get:

Thus the standard potential E°, for this reaction is 0.124 V

the answer is b because, investigating whether another species of moth also drinks tears might be interesting, but it would not directly explain why this species of moth does.

to explain why this species of moth drinks tears, the scientist could ask: "what nutrients that moths need are in elephant tears? "

the scientist could experiment with moth repellent or oter ways to keep the moths away, but that would not answer his original question.