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scoray [572]
3 years ago
6

A piece of silver is observed to be scratched bent and coated with tarnish. which is the chemical change?

Chemistry
2 answers:
Alex777 [14]3 years ago
8 0
Answer:

The answer is D

Explanation:
Tarnish allows silver to lose its sheen. A is a physical change because it’s only bending it. Get scratched does not change its chemical properties.
Tomtit [17]3 years ago
4 0

Answer:

The answer is D.

Explanation:

Silver consists of 92.5% silver, and the remaining part is copper. ... Pure silver is not susceptible to tarnish in a pure oxygen environment. However, the copper that is contained in 925 sterling silver may react to the ozone and hydrogen sulfide in the air and cause sterling silver to tarnish.

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To ensure that the 9-Fluorenone was totally dry, it had to be washed with methylene chloride. To make sure that methylene chloride is present in a pure solution, sodium sulfate binds to water and precipitates.

<h3>What is the purpose of the sodium sulfate?</h3>
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<h3>What is Valence bond theory?</h3>

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