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Magnetic forces, magnetic fields, and Faraday's law Quiz

Magnetic forces, magnetic fields, and Faraday's law Quiz

Phys12 Magnetic Flux and Faraday's Law Quiz

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Quiz Questions And Answers

__________ use an externally generated electrical current to produce a chemical reaction that would not otherwise take place.

Voltaic cells
Electrolytic cells
Salt bridges

Michael Faraday found that the mass of a substance produced by a redox reaction at an electrode is __________ the quantity of electrical charge that has passed through the electroc

less than
the square root of
proportional to

The charge on one mole of electrons is __________ Coulombs.

186000
96500
0.05916

Consider the reduction of Mn 7+ to Mn 2+. How many Faradays of electrical charge are needed?

2
7
5

The electrolysis of a sample of LiBr yielded 20.82 grams of lithium when 3.0 Faradays of electricity were passed through the sample. What was the mass of the sample?

20.82 grams
260.5 grams
239.7 grams

A conclusion from Faraday's second law is that for a given quantity of electricity, the moles of substance produced __________ as the oxidation number increases.

increases
is equivalent
decreases

The electrolysis of water produces

gaseous water
H 2 and O 2 gases
electrically charged water

Electrolysis uses electrical current to

speed up a spontaneous reaction
force a nonspontaneous reaction to occur
stop a spontaneous reaction from proceeding

The fundamental quantity of electrical charge on one mole of electrons used by chemists is a

Faraday
pooraday
volt

Magnetic fields are made by...?

Electric Currents
Gravity
Friction
Heat
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