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3 years ago

12. In the modern periodic table, which of the following describes the elements with similar

Chemistry

2 answers:

V125BC [204]3 years ago

8 0

B. same group I believe

Inga [223]3 years ago

7 0

The answer the is b, they are located in the same group. Because elements in the same group have the same number of valence electrons which also means that they share similar properties.

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Which compound plays an important role in leather processing and electroplating?

Margaret [11]

<u>Answer;</u>

Hydrochloric acid

<u>Explanation;</u>

Hydrochlorc acid plays a vital role in leather processing and electroplating.
Hydrochloric acid has a number of important applications in real life these includes; fertilizers, and dyes, textile, in electroplating, rubber and in the photographic industries.
Electroplating is the process that involves coating a metal using another metal for the purpose of improving their appearance or preventing rusting.
Hydrochloric acids is used in the processing of leather or the tanning of leather process, in which tanneries use the acid to stop the growth of bacteria and also maintain proper pH.

7 0

3 years ago

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What mass of cu(s)cu(s) is electroplated by running 14. 5 aa of current through a cu2 (aq)cu2 (aq) solution for 4. 00 hh?

galina1969 [7]

The mass of Copper electroplated is 68.76 g

<h3>What is electroplating?</h3>

The process of plating a metal onto another is known as electroplating.

It is often used to prevent corrosion of metal or for the decorative purposes

In this process, electric current is passed through an aqueous solution containing dissolved cations.

The dissolved cations are reduced developing a thin metal coating on the electrode.

At cathode,

$Cu^{2+}(aq) + 2e^-\rightarrow Cu(s)$

Current, I = 14.5 A

Time, t = 4 hrs = 4×60×60 = 14400 sec

Charge, q = It = 14.5×14400= 208800 C

Copper metal deposited by 2×96487 C = 63.55 g

Copper metal deposited by 208800 C = $\frac{63.55 \times208800}{2\times96487}$

= 68.76g

Hence, The mass of Copper electroplated is 68.76 g

Learn more about electroplating:

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4 0

1 year ago

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Which of the following breaks and forms bonds?

svp [43]

Your answer would be "Chemical Change"

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3 years ago

Contrast the silica content of magma in quiet and explosive eruptions

klemol [59]

Magma in quiet eruptions has a low content in silica , while in explosive eruptions, it has a high Content in silica. A volcano that erupts quietly has magma that is low in silica. Low-silica magma has low viscosity and flows easily. A volcano that erupts explosively has magma that is high in silica. High-silica magma has high viscosity, making it thick and sticky, thus it flows slowly.

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3 years ago

Non-ferrous alloys do not contain <br> a. copper. <br> b. brass. <br> c. gold. <br> d. iron.

Elena L [17]

Iron is the correct answer

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3 years ago

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