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stepladder [879]
2 years ago
10

Rocks beneath the surface are forced toward the________.

Chemistry
2 answers:
Angelina_Jolie [31]2 years ago
7 0

Ans

the mantle

Explanation:

Lynna [10]2 years ago
7 0
Mantle :)

“Rocks beneath the surface are forced toward the "mantle". This increases pressure and heat. "Magma" pockets rise, increasing heat. Temperature and pressure cause "minerals" to change.” -quizlet
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The measured voltage of an electrochemical cell consisting of pure nickel immersed in a solution of Ni2+ ions of unknown concent
Verizon [17]

Answer:

[Ni²⁺] = 1.33 M

Explanation:

To do this, we need to use the Nernst equation which (in standard conditions of temperature)

E = E° - RT/nF lnQ

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E = E° - 0.05916/n logQ

As the nickel is in the cathode, this means that this element is being reducted while Cadmium is being oxidized, therefore the REDOX reaction would be:

Cd(s) + Ni²⁺(aq) --------> Cd²⁺(aq) + Ni(s)

With this, Q:

Q = [Cd²⁺] / [Ni²⁺]

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Cd(s) ------------> Cd²⁺ + 2e⁻       E°₁ = 0.40 V

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E° = E°₁ + E°₂

E° = 0.40 - 0.25 = 0.15 V

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0.133 = 0.15 - 0.05916/2 log(5/[Ni²⁺])

0.133 - 0.15 = -0.05916/2 log(5/[Ni²⁺])

-0.017 = -0.02958 log(5/[Ni²⁺])

-0.017/-0.02958 = log(5/[Ni²⁺])

0.5747 = log(5/[Ni²⁺])

10^(0.5747) = 5/[Ni²⁺]

[Ni²⁺] = 5/3.7558

<h2>[Ni²⁺] = 1.33 M</h2>
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