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Ivahew [28]
3 years ago
10

CHEMISTRY QUESTION 20 pts.... URGENT

Chemistry
1 answer:
Damm [24]3 years ago
7 0

Answer:

E i is like Math so I think this will help you

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viscosity

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Purification of chromium can be achieved by electrorefining chromium from an impure chromium anode onto a pure chromium cathode
miskamm [114]

Answer:

544.522 Hours

Explanation:

a) Mass = 12.5 kg = 12500 g

Now, Number of moles is given as

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=\frac{12500}{52}

= 240.38 moles

Cr^{3+}\Rightarrow 3 mols of electrons are required

\Rightarrow 240.38\times3 =721.14\text{mol of e-}

Converting moles of e- to coulombs of charge, (1 mol of electrons = 96500 C )

Q =721.14 mol×96500 C/mol

=69590010 of charge

We know that, Q = I×t

where Q is charge, I is current and t is time required.

\Rightarrow t =\frac{Q}{I}

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3 0
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