Answer:
The answer to your problem is
B) river water stored in a reservoir flows down a channel in a dam, turning a turbine as it passes. the turbine is connected to a generator that produces electricity, and then the water continues downstream
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Explanation:
The answer is the third choice because is oxidation half reactions, only the oxidation state of the reducing agent changes; in this third choice, Fe2+ is oxidized and becomes Fe3+. Just keep in mind that half reactions usually include the change in electrons:
Fe2+ -> Fe3+ +e-<span />
If a substance causes another substance to be oxidized, that substance is an oxidizing agent. Likewise, the substance that is oxidized in an electrochemical reaction is always the reducing agent.
An Oxidizing agent is the one that gets reduced by accepting electrons. It causes oxidation because it makes the other substance lose electrons.
Oxidizing agents also transfer one electronegative atom like oxygen to the other chemical substance. Halogens are an example of oxidizing agents.
A reducing agent is the one that gets oxidized because it loses electrons in a redox reaction. It loses electrons and achieve a higher oxidation state. Lithium is an example of a reducing agent.
If you need to learn more about oxidizing and reducing agent, click here
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3.4 x10^3 best answer to the question
PV = nRT
I only know the valeu of R is you're using atm, so convert kPa to atm.
1 atm = 101.325 kPa
2.52 atm = 255 kPa
2.52atm(x) = 7(.0821)(342)
2.52atm(x) = 196.5
x = 78
78 liters