Answer:
The answer to your question is D.
Explanation:
The latitudes near the equator receives the most direct solar energy.
Hope this helps :)
The steam rotates a turbine that activates a generator, which produces electricity. Many power plants still use fossil fuels to boil water for steam. Geothermal power plants, however, use steam produced from reservoirs of hot water found a couple of miles or more below the Earth's surface.
Answer:
0.758 V.
Explanation:
Hello!
In this case, case when we include the effect of concentration on an electrochemical cell, we need to consider the Nerst equation at 25 °C:
![E=E\°-\frac{0.0591}{n} log(Q)](https://tex.z-dn.net/?f=E%3DE%5C%C2%B0-%5Cfrac%7B0.0591%7D%7Bn%7D%20log%28Q%29)
Whereas n stands for the number of moles of transferred electrons and Q the reaction quotient relating the concentration of the oxidized species over the concentration of the reduced species. In such a way, we can write the undergoing half-reactions in the cell, considering the iron's one is reversed because it has the most positive standard potential so it tends to reduction:
![Fe^{2+}+2e^-\rightarrow Fe^0\ \ \ E\°=0.440V\\\\Ni^0\rightarrow Ni^{2+}+2e^-\ \ \ E\°=-0.250V](https://tex.z-dn.net/?f=Fe%5E%7B2%2B%7D%2B2e%5E-%5Crightarrow%20Fe%5E0%5C%20%5C%20%5C%20E%5C%C2%B0%3D0.440V%5C%5C%5C%5CNi%5E0%5Crightarrow%20Ni%5E%7B2%2B%7D%2B2e%5E-%5C%20%5C%20%5C%20E%5C%C2%B0%3D-0.250V)
It means that the concentration of the oxidized species is 0.002 M (that of nickel), that of the reduced species is 0.40 M and there are two moles of transferred electrons; therefore, the generated potential turns out:
![E=(0.440V+0.250V)-\frac{0.0591}{2} log(\frac{0.002M}{0.40M} )\\\\E=0.758V](https://tex.z-dn.net/?f=E%3D%280.440V%2B0.250V%29-%5Cfrac%7B0.0591%7D%7B2%7D%20log%28%5Cfrac%7B0.002M%7D%7B0.40M%7D%20%29%5C%5C%5C%5CE%3D0.758V)
Beat regards!