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2 years ago

15

What is the oxidation state of Hydrogen in H20 +2 +1 -2 -1

1 answer:

xeze [42]2 years ago

6 0

<h3>What is the oxidation number of oxygen in H2O?</h3>

Oxygen almost always has an oxidation number of -2, except in peroxides (H 2 O 2) where it is -1 and in compounds with fluorine (OF 2) where it is +2. Hydrogen has an oxidation number of +1 when combined with non-metals, but it has an oxidation number of -1 when combined with metals.

<h3><em>Sure hoep this helps you :)</em></h3>

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2 years ago

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Keith_Richards [23]

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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

No of moles = Mass of Cr / Molar mass of Cr

$=\frac{12500}{52}$

= 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 years ago

Question 1 of 10

kati45 [8]

I believe the answer is C.

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2 years ago