5. Germanium forms a substitutional solid solution with silicon. Compute the number of germanium atoms per cubic centimeter for a germanium-silicon alloy that contains 15 wt% Ge and 85 wt% Si. The densities of pure germanium and silicon are 5.32 and 2.33 g/cm3, respectively. Atomic weight of Ge is 72.64 g/mol
Answers
Answer:
There are \(6.624 \times 10^{21}\,atoms\) of Germanium in a germanium-silicon alloy that contains 15 wt% Ge and 85 wt% Si.
Explanation:
The masses of silicon and germanium contained in a cubic centimeter of the germanium-silicon alloy by apply the concepts of mass (\(m\)), density (\(\rho\)) and volume (\(V\)), as well as the mass-mass proportion of Germanium (\(x\)):
\(m_{Ge} = x \cdot \rho_{Ge}\cdot V_{sample}\)
\(m_{Ge} = 0.15\cdot \left(5.32\,\frac{g}{cm^{3}} \right)\cdot (1\,cm^{3})\)
\(m_{Ge} = 0.798\,g\)
The amount of moles of Germanium is obtained after dividing previous outcome by its atomic weight. That is to say:
\(n = \frac{m_{Ge}}{M_{Ge}}\)
\(n = \frac{0.798\,g}{72.64\,\frac{g}{mol} }\)
\(n = 0.011\,mol\)
There are 0.011 moles in a cubic centimeter of the germanium-silicon alloy. According to the Law of Avogadro, there are \(6.022 \times 10^{23}\,atoms\) in a mole of Germanium. The quantity of atoms in a cubic centimeter is therefore found by simple rule of three:
\(y = \frac{0.011\,mol}{1\,mol}\times \left(6.022\times 10^{23}\,\frac{atoms}{mole} \right)\)
\(y = 6.624 \times 10^{21}\,atoms\)
There are \(6.624 \times 10^{21}\,atoms\) of Germanium in a germanium-silicon alloy that contains 15 wt% Ge and 85 wt% Si.
Related Questions
hi i am a teacher and i want to say to stop using brainly we strictly banned brainly but our students keep using it
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Answer:
Then miss try to get your school to banned it for your district like forbid then from the web site then it will not allow them to use it. then sometimes use it to help other people who needs help like teachers do or we need help with something we dont know so we ask for help for a better understanding of it.
Explanation:
^-^ hope you have a good day miss or sir
Answer:
So I would love to say that you and your team at your school had banned brainly and why are you using brainly here, then you shouldn't use brainly, and brainly all students around the world gets help even you is one.
Liquefied Natural Gas (LNG) is a natural gas in its liquid form that is clear, colorless, odorless, non-corrosive, and non-toxic.
Answers
Answer:
liquifid gas
Explanation:
when gas is introduced to a certain chemical it ends up slowly liquifying itself.
If water is inserted between plates of a capacitor, what do you think will happen?
Answers
Answer:
We well know that water is a conductor of charges. So, when it is between capacitor plates, the charges flow from positive plate to negative plate hence discharge occurs
Explanation:
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why must nitrogen be used only with a regulator when it is charged into a system
Answers
To control and regulate the pressure of nitrogen being charged into the system.
Why must nitrogen be used with a regulator when charged into a system?When nitrogen is charged into a system, it is often done at high pressure. Therefore, it is necessary to use a regulator to control the pressure of the nitrogen being introduced to the system. The regulator reduces the high pressure to a lower and safe level that is appropriate for the system being charged. Without a regulator, there is a risk of over-pressurizing the system, which can cause damage or failure. Additionally, using a regulator allows for more precise control over the pressure, which is important for ensuring the system operates correctly and safely.
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a 12-bit converter has an input range of /- 10 v and is connected to amplifier with following gains: 1, 10, 100 and 500. the connected sensor has maximum output of 7.5 mv. select appropriate gain to minimize the quantization error. calculate percentage quantization error for the maximum input.
Answers
Maximum quantization error is calculated using the formula Maximum quantization error = (VH - VL)/2(2n), where n is the ADC's resolution in bits.
The largest inaccuracy that can occur corresponds to a voltage that is (1/2) of an LSB. This quantization would be the sole cause of error in the recorded samples for a perfect digital recorder. This mistake establishes the absolute upper bound on the readings' accuracy for a real digital recorder. The difference between the analog signal and the nearest available digital value at each sampling instant from the A/D converter is known as the quantization error. Quantization error also introduces noise to the sample signal known as quantization noise.
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affect the amount and rate the alcohol reaches the
bloodstream.
Answers
Answer:
Answer to the following question is as follows;
Explanation:
The amount of alcohol consumption can be influenced by a variety of things, including food.
The proportion and pace at which alcohol reaches the circulation is affected by drinking rate, body mass, and the size of the beverage. Alcohol enters your system as soon as it reaches that first sip, as per the National Institute on Drug Abuse and Alcoholism. After 10 minutes, the results are noticeable.
Cite another example of information technology companies pushing the boundaries of privacy issues; apologizing, and then pushing again once scandal dies down. As long as the controversy fades, is there anything unethical about such a strategy?
Answers
Answer:
Explanation:
Tech Social Media giant FB is one of those companies. Not long ago the ceo was brought to court to accusations that his company was selling user data. Turns out this is true and they are selling their users private data to companies all over the word. Once the news turned to something else, people focused on something new but the company still continues to sell it's users data the same as before. This is completely unethical as the information belongs to the user and they are not getting anything while the corporation is profiting.
The quantity of bricks required increases with the surface area of the wall, but the thickness of a masonry wall does not affect the total quantity of bricks used in the wall
True or False
Answers
Answer:
false
Explanation:
During which step of a free-radical chain-growth polymerization does the polymer actually grow or chain extend?.
Answers
During propagation step of a free-radical chain-growth polymerization does the polymer actually grow or chain extend.
What is radical chain-growth polymerization?
The process of free-radical chain growth in polymers. Common free-radical reactions include polymerizations using free-radical mechanisms. The formation of radicals is the initiation, the development of the products is the propagation, and the ending of the free-radical chain reactions is the termination.What distinguishes step growth polymerization from chain growth polymerization?
The polymer chain in chain growth always expands one monomer at a time. The polymer chain doubles with each step of step development. The polymer chain's rate of expansion is drastically different in these two situations as a result. Every coupling step causes chain growth, which causes the chain length to gradually expand.Learn more about radical chain-growth polymerization
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Hey guys can anyone list chemical engineering advancement that has been discovered within the past 20 years
Answers
Nanopesticides. The world population keeps growing. ...
Enantio selective organocatalysis. ...
Solid-state batteries. ...
Flow Chemistry. ...
Porous material for Water Harvesting. ...
Directed evolution of selective enzymes. ...
From plastics to monomers. ...
What needs to be done before joining a fitting and pipe using socket fusion?
Answers
Before joining a fitting and pipe using socket fusion, it is important to ensure that both the fitting and pipe are clean and free from any debris or contaminants. Additionally, the correct size fitting and pipe must be used to ensure a proper fit.
Socket fusion is a method of joining plastic pipes and fittings together by heating the material and then pressing the heated ends together to form a strong bond. Before the socket fusion process begins, it is important to prepare both the fitting and pipe by ensuring they are clean and free from any debris or contaminants.
This can be achieved by using a specialized cleaning tool or wiping the surfaces with a clean cloth. Additionally, it is crucial to use the correct size fitting and pipe to ensure a proper fit and prevent any leaks or issues in the future. Proper preparation of the materials is crucial to ensuring a successful socket fusion joint.
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What cell type has no membrane-bound organelles, has DNA that is found in an area called the
nucleoid, and is very small?
A. Eukaryotic cell
B. Prokaryotic cell
C. Animal cell
D. Plant cell
Answers
Answer:
Prokaryotic cell
Explanation:
Since most architects have at least a bachelor's degree, they do not require on-the-job training.
O True
O False
Answers
Answer:
The answer is false, I hope this helps. :3
Answer:
False
Explanation:
I took the quiz and it was correct
Tech a says you should push the wrench when braking a fastener loose. Tech b says that you should pull the wrench when braking a fastener loose. Who is correct?
Answers
Answer:
tech b because gut feeling
Explanation:
The term route of entry on an SDS refers to the way a _____ enters the body
Answers
Answer:
No matter what u post on a football page, some fatherless dude will either say "pessi" or "penaldo"
A company makes two products (X and Y) using two machines (A and B). Each unit of X that is produced requires 50 minutes processing time on machine A and 30 minutes processing time on machine B. Each unit of Y that is produced requires 24 minutes processing time on machine A and 33 minutes processing time on machine B. At the start of the current week there are 30 units of X and 90 units of Y in stock. Available processing time on machine A is forecast to be 40 hours and on machine B is forecast to be 35 hours. The demand for X in the current week is forecast to be 75 units and for Y is forecast to be 95 units. Company policy is to maximize the combined sum of the units of X and the units of Y in the stock at the end of the week. Solve this linear program graphically
Answers
The optimal solution is to produce 45 units of X and 5 units of Y to meet the demand—stock at the end of the week: 0 units of X and 0 units of Y.
How to solveTo maximize the combined sum of units X and Y in stock at the end of the week, we must determine how many units of X and Y can be produced given the available machine processing time.
Convert machine hours to minutes: Machine A = 40 * 60 = 2400 minutes; Machine B = 35 * 60 = 2100 minutes.
Set up equations for machine time: 50X + 24Y <= 2400 (Machine A); 30X + 33Y <= 2100 (Machine B).
Given initial stock and demand, calculate the remaining units needed: X = 75 - 30 = 45; Y = 95 - 90 = 5.
Find production quantities within constraints that maximize stock (use Integer Linear Programming or trial-and-error method).
The optimal solution is to produce 45 units of X and 5 units of Y to meet the demand—stock at the end of the week: 0 units of X and 0 units of Y.
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Building science is the study of engineering, design, and physics involved in making structures efficient, safe, practical, and comfortable. Which of the following represents a problem that a building scientist would address?
creating a foundation that resists the effects of acidic soil
creating a foundation that resists the effects of acidic soil
revoking improperly administered certificates of occupancy
revoking improperly administered certificates of occupancy
revising outdated land-use planning practices
revising outdated land-use planning practices
combating the effects of suburban sprawl
Answers
A building scientist would handle the issue of creating a foundation that is resistant to the impacts of acidic soil. Architecture experts are focused on the security and sustainability of structure, and the base is an important component of the structural stability of a building.
The presence of acidic soil can induce foundation corrosion, resulting in structural deterioration over time. Building scientists would apply their expertise of materials science, engineering, and design to create solutions that can survive the impacts of acidic soil and assure the foundation's lifetime.
Soil is the weaker material layer that covers the majority of the ground. It is made up of inorganic and organic particles. Soil gives structural support to agricultural plants while also serving as a source of water and nutrients.
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An aircraft had a 100-hour inspection when the tachometer read 1259.6. When is the next 100- hour inspection due? A- 1349.6 hours.
Answers
The next 100-hour inspection for the aircraft is due when the tachometer reaches 1349.6 hours.
The 100-hour inspection for an aircraft refers to a maintenance requirement that needs to be performed after every 100 hours of flight time. It is an important safety measure to ensure the aircraft's airworthiness and identify any potential issues or wear and tear that may have occurred during its operation.
In the given scenario, the next 100-hour inspection for the aircraft is scheduled to take place when the tachometer reading reaches 1349.6 hours. The tachometer is a device that measures the running time of the aircraft's engine. It provides an indication of the total number of hours the engine has been in operation.
When the tachometer reading reaches the specified threshold of 1349.6 hours, it serves as a trigger for the aircraft owner or maintenance personnel to schedule and carry out the 100-hour inspection. This inspection involves a comprehensive examination of various aircraft components, systems, and structures to ensure their proper functioning and adherence to safety standards.
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what add the most carbon dioxide to the atmosphere
Answers
Answer:
Volcanic outgassing
The burning of fossil fuels (coal, oil, gasoline, natural gas), for heating, power generation and transport
Some industrial processes such as cement making.
Explanation:
The possibility of carburetor icing exists even when the ambient air temperature is as:__________
Answers
The possibility of carburetor icing exists even when the ambient air temperature is as high as 70 degrees Fahrenheit.
Carburetor icing can occur when the temperature and humidity levels are just right, causing ice to form inside the carburetor and block the air flow. This can cause the engine to stall or run poorly. It is important for pilots and aircraft owners to be aware of the potential for carburetor icing and take steps to prevent it, such as using carburetor heat when necessary. Additionally, it is important to monitor weather conditions and be cautious when flying in conditions that could increase the risk of carburetor icing, such as high humidity and rapidly dropping temperatures.
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The figure below appeared three heat treatments processes of steel (A, B and C),
select only One and answer the following:
1- Named the heat treatment process.
2- The temperature range of heating process.
3- The cooling process method.
4- The aims of process.
Answers
Answer:
b
Explanation:
A quantity of gas occupied a volume of 0. 3m cube at a pressure of 300KN/m square and a temperature of 20 degree Celsius the gas compressed isothermally to a pressure of of 800KN/m square and then expanded adiabatically to it's initial volume
Answers
Therefore, the final pressure of the gas is 1.52 MPa (megaPascals).
We can use the ideal gas law to solve this problem:
PV = nRT
where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.
First, we need to find the initial number of moles of gas:
n1 = (P1 V1)/(R T1)
= (300 x 10^3 Pa) x (0.3 m^3)/(8.31 J/(mol K) x (20 + 273) K)
= 4.97 mol
where R = 8.31 J/(mol K) is the gas constant.
Next, we can use the fact that the process is isothermal (i.e., at constant temperature) to find the final volume of the gas after it is compressed to a pressure of 800 kN/m^2:
P1 V1 = P2 V2
V2 = (P1 V1)/P2
= (300 x 10^3 Pa) x (0.3 m^3)/(800 x 10^3 Pa)
= 0.1125 m^3
Now we can use the fact that the process is adiabatic (i.e., no heat is exchanged with the surroundings) and that the initial and final volumes are the same to find the final pressure of the gas:
P1 V1^γ = P2 V2^γ
where γ is the adiabatic index (a property of the gas), which depends on the specific gas. For simplicity, we will assume that γ = 1.4, which is a reasonable value for diatomic gases such as nitrogen and oxygen.
P2 = P1 (V1/V2)^γ
= (300 x 10^3 Pa) x (0.3 m^3/0.1125 m^3)^1.4
= 1.52 x 10^6 Pa
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How can you throw a ball as hard as you can and have it come back to you, even if it doesn't
bounce off anything? There is nothing attached to it, and no one else catches or throws it back to
you.
Answers
Answer:
Magic
Explanation:
magic is the answer to everything unexplainable
Anyone help me please ?
Answers
Answer:
I can help but I need to know what it looking for
A driver younger than 18 years of age may not operate a motor vehicle with any passenger who is not an immediate family member until 6 months from the date that the person's driver's license was issued.
O True
O False
Answers
ahahahahaggaaggagagag
Doubling the diameter of a solid, cylindrical wire doubles its strength in tension.
True
False
Answers
Answer:
True ❤️
-Solid by solid can make Cylindrical wire doubles Strengths in tension
Select three mechanical processes used in the manufacturing phase of engineering.
Drying
Mixing
Cooling
Crystallization
Size reduction
Food packaging
Answers
Answer:Size reduction
Cooling
Mixing
Explanation:
I Need help with this question
Answers
It is okay to lift one end of the vehicle:
A) As long as two swing arms are being used
B) As long as the wheels have been chocked
C) As long as the swing arm restraints are engaged
D) None of the above
Answers
It is okay to lift one end of the vehicle B) As long as the wheels have been chocked.
What is a Safety Procedure?This refers to the processes that are undertaken in order to undertake a task safely, both for the person executing the task and others around.
Hence, we can see that It is okay to lift one end of the vehicle B) As long as the wheels have been chocked
This is because it would enable the vehicle to be safely positioned so the wheels would not roll off and cause an accident.
This safety procedure allows a person to raise one end of a vehicle, if the wheels have been chocked, to keep them in place.
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Lara received $900 in one paycheck. If she follows the 50-30-20 method, how much money will she put toward her wants?
Answers
Answer:
$270
Explanation:
Formulate the following based on the given conditions: 3x 80 Determine the product or quotient is 240
What is saving accounts?A savings account is a simple type of financial product that allows you to deposit funds and earn a small amount of interest. These accounts are federally insured up to $250,000 per account owner and provide a secure place for your money to grow while earning interest.
A savings account is a simple type of financial product that allows you to deposit funds and earn a small amount of interest. These accounts are federally insured up to $250,000 per account owner and provide a secure place for your money to grow while earning interest.
While there are several types of savings accounts, the deposit account, money market account, and certificate of deposit are the three most common.
Therefore, Lara has three savings accounts into which she distributes her money each pay check; if she puts at least $80 in each account this pay period, she can earn $240.
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