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Stells [14]
3 years ago
7

Explain why Statutes coated with white lead on long exposure to atmosphere

Chemistry
2 answers:
g100num [7]3 years ago
8 0

Answer:

Its because once you go black, there's no going back

Explanation:

Zanzabum3 years ago
6 0
Explain why Statutes coated with white lead on long exposure to atmosphere
turn black and the original colour can be restored on treatment
with H2O2.

Long exposure to atmosphere converts white lead into black PbS due to H2S present in the atmosphere. As a result, statues turn black. On treatment with H2O2, the black PbS get oxidized to white PbSO4 and the colour is restored. Hydrogen peroxide is just one oxygen atom different from Water.
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Answer:

<h3>The answer is option A</h3>

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

n =  \frac{N}{L}  \\

where n is the number of moles

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From the question we have

n =  \frac{18.0 \times  {10}^{23} }{6.02 \times  {10}^{23} }  =  \frac{18}{6.02}  \\  = 2.99003322...

We have the final answer as

<h3>2.99 moles</h3>

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