1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Tanya [424]
3 years ago
5

A manufacturer of trophies wants to cover a trophy made of tin with thin layers of silver and gold. Which of the following proce

sses should the manufacturer use to perform this task?
A.) anodization
B.) electroplating
C.) electrometallurgy
D.) hydrolysis
Chemistry
2 answers:
zaharov [31]3 years ago
8 0
The answer is B.)electroplating
yuradex [85]3 years ago
8 0

Answer:

B.) electroplating

Explanation:

In the process of electroplating an expensive metal such as gold is coated over a base metal in thin layers in the presence of electricity. Electroplating takes place in an electrolytic cell, where the gold is the anode and the base metal is the cathode. A DC current is applied to complete the circuit. The gold ions are reduced and get deposited at the cathode.

You might be interested in
I need help with this someone help
allochka39001 [22]

Answer:

1. Element is Ca

2. 20 electrons

3. 2 valence electrons

4. 4 energy levels

6 0
2 years ago
Wat two common uses for Gallium??
Ann [662]

Answer:

mirrors and metal thermometers

Explanation:

ooga booga

6 0
3 years ago
Read 2 more answers
Aspirin sun thesis Green Chemistry and Assime the aspirin is prepared by the following reaction and that 10.09. of salicylic aci
klemol [59]

<u>Answer:</u> The percentage yield of aspirin is 38.02 %.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}      .....(1)

  • <u>For salicylic acid:</u>

Given mass of salicylic acid (C_7H_6O_3) = 10.09 g

Molar mass of salicylic acid (C_7H_6O_3) = 138.12 g/mol

Putting values in equation 1, we get:

\text{Moles of salicylic acid}=\frac{10.09g}{138.12g/mol}=0.0730mol

The chemical equation for the formation of aspirin follows:

C_7H_6O_3+C_4H_6O_3\rightarrow C_9H_8O_4+CH_3COOH

As, acetic anhydride is present in excess. So, it is considered as an excess reagent.

Thus, salicylic acid is a limiting reagent because it limits the formation of products.

By Stoichiometry of the reaction:

1 mole of salicylic acid produces 1 mole of aspirin.

So, 0.0730 moles of salicylic acid will produce = \frac{1}{1}\times 0.0730=0.0730mol of aspirin

Now, calculating the mass of aspirin from equation 1, we get:

Molar mass of aspirin = 180.16 g/mol

Moles of aspirin = 0.073 moles

Putting values in equation 1, we get:

0.073mol=\frac{\text{Mass of aspirin}}{180.16g/mol}\\\\\text{Mass of aspirin}=13.15g

To calculate the percentage yield of aspirin, we use the equation:

\%\text{ yield}=\frac{\text{Experimental yield}}{\text{Theoretical yield}}\times 100

Experimental yield of aspirin = 5.0 g

Theoretical yield of aspirin = 13.15 g

Putting values in above equation, we get:

\%\text{ yield of aspirin}=\frac{5.0g}{13.15g}\times 100\\\\\% \text{yield of aspirin}=38.02\%

Hence, the percent yield of aspirin is 38.01 %.

6 0
3 years ago
Helpppppo meeeeee plzzzzzzzzz
antoniya [11.8K]
For 2 it’s 2ft 10in
For 5 it’s 3ft 6in
You: put how tall you are
Adult: you can either measure an adult or use this 5 ft 10in
6 0
2 years ago
What is the pressure exerted by a 0.500 mol sample of nitrogen in a 10.0 L container at 20°C?
lidiya [134]
The answer would be D.120 kPa
6 0
3 years ago
Other questions:
  • What intermolecular forces are present in hydrogen chloride gas?
    5·1 answer
  • A topaz crystal has an interplanar spacing (d) of 1.36 Å (1 Å =1×10^[−10] m). Calculate the wavelength of the X-ray that should
    14·1 answer
  • Please help me!!!!!!​
    9·1 answer
  • Which of these are chemical changes in matter? Check all that apply.
    8·2 answers
  • Which of the following is NOT a characteristic of most ionic compounds?
    10·2 answers
  • A 6.32-l football is filled with air at 1.90 atm. the volume of the football is reduced to 3.49 l what is the pressure of the ba
    10·1 answer
  • Someone please help me!!
    7·1 answer
  • Two cars that are identical except for their color are traveling on the same road.
    15·2 answers
  • A wooden plank has a mass of 100kg force of 20 n was used to move it what is its acceleration​
    6·1 answer
  • What is the functional group and homologous series of ethyl butyrate?​
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!