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coldgirl [10]
2 years ago
14

A particular power source creates electricity through the use of giant magnets that are rotated to create a flow of electrons. T

his electricity is then directed:
A. from the electric generator to electric outlets in homes
B. from the electric device to an electric outlet
C. from the electric generator to a ground wire
D. to be stored in batteries, or "tanks."
Chemistry
2 answers:
Sloan [31]2 years ago
6 0
From the electric generator to electric outlets in homes
jeka942 years ago
4 0

Answer:The correct answer is option B.

Explanation:

The generation of the electricity due to rotation of magnet to create a flow of electrons is based on the Faraday's law of induction.

The law states that ' <em>whenever a conductor is kept in the varying magnetic field an electromotive force gets induced and if the circuit of conductor is closed induced emf will cause flow of current in a circuit'.</em>

The current generated in then sent through the transformer to increase the potential so as to further distribute the current in various electrical lines according to demand.

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The redox reaction is

Ca^{+2}  + 2Li(s)  = Ca(s) + 2Li^{+}

Here

Calcium undergoes reduction, and acts as cathode

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The reduction potential of lithium is - -3.05 V

We know that

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Ecell = -2.87 - (-3.05)  = 0.18 V


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3 years ago
A sample of calcium oxide (CaO) has a mass of 2.80 g. The molar mass of CaO is 56.08 g/mol. How many moles of CaO does this samp
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Answer is "0.05 mol".

<em>Explanation;</em>

We can do calculation by using a simple formula as

n = m/M

Where, n is the number of moles of the substance (mol), m is the mass of the substance (g) and M is the molar mass of the substance (g/mol).

Here,

n = ?

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M = 56.08 g/mol

By substitution,

n = 2.80 g /56.08 g/mol

n = 0.0499 mol ≈ 0.05 mol

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