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Answer:
Is an isotope of Cu (Copper)
Explanation:
Remember that the mass number will tell you the number of protons and neutrons. If you have the mass number(65) and the number of neutrons (36), you just need to subtract: 65 - 36 = 29 the number or protons.
As this is a neutral isotope, that means that is going to have the same number of protons and electrons, that is 29.
Answer:
a) E = 0.477 V
b) E = 0.502 V
c) 0.02 M = [Ni+2]
d)[Zn+2] = 1.81 M
Explanation:
having the following reactions of each cell:
Zn =⇒ Zn+2 + 2e- +0.76
Ni+2 + 2e- =⇒ Ni -0.25
Zn + Ni+2 ==⇒ Ni + Zn+2 Eo = 0.51
a)
The number of electrons being transferred is 2, therefore n = 2 in the Nernst equation
E = Eo - 0.0592/2*log [Zn+2]/[Ni+2] = 0.51 - 0.0592/2*log[0.13/1.7] = 0.477 V
b)
using the formula above:
E = 0.51 - 0.0296*log [Zn+2]/[Ni+2] = 0.51 - 0.0296*log((0.13+0.5)/(1.7-0.5)) = 0.502 V
c)
using the formula above:
0.45 = 0.51 - 0.0296*log[Zn+2]/[Ni+2]
-0.06/-0.0296 = log[Zn+2]/[Ni+2]
2.02 = log [Zn+] / [Ni+2]
104.71 = [Zn+2] / [Ni+2]
x = change in [Ni+2]
[Ni+2] = 1.70 - x
[Zn+2] = 0.13 + x
0.13 + x/1.70 –x = 104.71
Resolving x:
x = 1.68 M
[Ni+2] = 1.70 - 1.68 = 0.02 M
d)
[Zn+2] = 0.13 + x = 0.13 + 1.68 = 1.81 M
