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
alukav5142 [94]
3 years ago
8

Tin atoms are introduced into a FCC copper crystal, producing an alloy with a lattice pa- rameter of 3.7589 x 10-8 cm and a dens

ity of 8.772 g/cm3. Calculate the atomic percentage of tin present in the alloy.
Engineering
1 answer:
stira [4]3 years ago
7 0

Given:

Lattice parameter, a = 3.7589\times 10^{-8}cm

density, \rho = 8.772g/cm^{3}\\

Solution:

We know that  for FCC, total no. of atoms in a crystal lattice = 4

let the number of atoms in Tin for alloying be 'n'

⇒ Total no. of Copper atoms in the alloy,  = 4 - n

Also mass of Copper, m = 63.54 g/mol

atomic mass of Tin = 118.69 g/mol

We Know density of the crystal lattice is given by the formula:

\rho = \frac{m\times Z}{a^{3}\times N_{A}}                 (1)

where,

N_{A} = Avagadro's number =  6.23\times 10_{23}

Putting all the values in eqn (1), we get

8.772 = \frac{118.69\times x\times (4 - n)\times 63.54}{(3.7589\times 10^{-8})^{3}\times 6.023\times 10^{23}}

280.6 = 55.15n +254.16

n = 0.479 atoms/cell

Now to calculate the atomic percentage of Tin present in the alloy:

atomic percentage = \frac{no. of atoms in Tin/cell}{Total no. of atoms in FCC lattice}

atomic % Tin present in alloy = \frac{0.479}{4} = 0.1198\times 100

atomic % Tin present in alloy = 11.98%

You might be interested in
Draw the free-body diagram of the beam which supports the 80-kg load and is supported by the
Sauron [17]

The free-body diagram of the beam which supports the 80-kg load and is supported by the pin at A can be seen in the image attached below.

The first image shows the diagram of the beam and the second image shows the free-body diagram of the beam.

The resolution of forces in the system is well understood by the principle of equilibrium where a stationary body will remain balanced when subject to parallel forces provided that the total sum of the overall external forces is zero.

The free-body diagram is a graphical representation used to visualize the forces applied to an object.

The equilibrium of forces on the x-axis is:

\mathbf{\sum F_x  = 0}

The equilibrium of forces on the y-axis is:

\mathbf{\sum F_y = 0}

The equilibrium condition at any point is:

\mathbf{\sum M = 0}

From the free body diagram attached in the second image below,

  • the horizontal reaction is located at point A as \mathbf{ A_x}
  • the vertical reaction is  located at point A  as \mathbf{A_y}
  • the tension =  T
  • the weight = W

Therefore, we can conclude that the free-body diagram of the beam which supports the 80-kg load and is supported by the pin at A can be seen in the image attached below.

Learn more about the free-body diagram here:

brainly.com/question/19345060?referrer=searchResults

5 0
3 years ago
An electrochemical cell is composed of pure nickel and pure iron electrodes immersed in solutions of their divalent ions. If the
xenn [34]

Answer:C  0.12 V

Explanation:

Given

Concentration of Fe^{2+} M_1=0.40 M

Concentration of Ni^{2+} M_2=0.002 M

Standard Potential for Ni and Fe are V_2=-0.25 V  and V_1=-0.44 V

\Delta V=V_2-V_1-\frac{0.0592}{2}\log (\frac{M_1}{M_2})

\Delta V=-0.25-(-0.44)-\frac{0.0592}{2}\log (\frac{0.4}{0.002})

\Delta V=0.12\ V

7 0
3 years ago
The most important rating for batteries is the what
kifflom [539]

Answer:

I'm completely sure that the answer is: The most important rating for batteries is the ampere-hour rating. Ampere-hour is the battery discharge rating. It's used as a measure of charge in your device. It indicates how long your device will work without charging.

Explanation:

Hope this helped!

7 0
3 years ago
Vector A extends from the origin to a point having polar coordinates (7, 70ᵒ ) and vector B extends from the origin to a point h
yaroslaw [1]

Answer:

13.95

Explanation:

Given :

Vector A polar coordinates = ( 7, 70° )

Vector B polar coordinates = ( 4, 130° )

To find A . B we  will

A ( r , ∅ ) = ( 7, 70 )

A = rcos∅ + rsin∅

therefore ; A  = 2.394i + 6.57j

B ( r , ∅ ) = ( 4, 130° )

B = rcos∅ + rsin∅

therefore ;  B = -2.57i + 3.06j

Hence ; A .B

( 2.394 i + 6.57j ) . ( -2.57 + 3.06j ) = 13.95

8 0
3 years ago
I’m doing a project on renewable energy. There are 6 energy sources. Solar, wind, geothermal, hydroelectric, tidal, and biomass.
nalin [4]

Answer:

"Biofuels"

Explanation:

I don't know if this counts but I guess it's not one of those.

6 0
3 years ago
Read 2 more answers
Other questions:
  • Which is the correct order for handwashing
    11·2 answers
  • Q: Draw shear and bending moment diagram for the beam shown in
    5·1 answer
  • Air at 2.5 bar, 400 K is extracted from a main jet engine compressor for cabin cooling. The extracted air enters a heat exchange
    14·2 answers
  • A car is traveling at 50 ft/s when the driver notices a stop sign 100 ft ahead and steps on the brake. Assuming that the deceler
    6·1 answer
  • 5 kg of a wet steam has a volume of 2 m3
    8·1 answer
  • In the car industry, clay models are used to visualize and test new car designs.
    5·2 answers
  • The reversible and adiabatic process of a substance in a compressor begins with enthalpy equal to 1,350 kJ/kg, and ends with ent
    15·1 answer
  • Resistance depends on which three properties of a wire?
    15·1 answer
  • A___ remote control can be an advantage to an
    14·2 answers
  • What is applied technology?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!