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
Why do electricians require critical thinking skills? In order to logically identify alternative solutions to problems in order
Rina8888 [55]

Answer:

In order to logically identify alternative solutions to problems

Explanation:

Electricians are specialized in electrical wiring of buildings, transmission lines, stationary machines, and related equipment. They are either employed in the installations of new electrical components, or to maintain an already installed component. The job of an electrician can be mentally tasking, especially in troubleshooting for fault, and methods of fixing of faults. Some problems might require an out-of-norm approach to solve, and the electrician has to be able to logically identify alternative solutions to problems.

8 0
3 years ago
Write in an Excel cell the appropriate @RISK function for a binomial distribution that results from 50 trials with probability o
borishaifa [10]

Answer:

Binomial Function

I got my output using the formula = 1 - BINOMDIST (17, 50, 0.3, TRUE)

Then got the cumulative probability distribution at 17 to be 0.2178

Explanation:

To draw a normal distribution:

1. Got to '@risk' and click on 'defined distribution'

2. Select 'binomial' in function block

3. enter formula in cell formula and click okay

The use of @RISK to draw a binomial distribution of 50 trials and probability of success as 0.3 by entering formular =RISKBINOMIAL (50, 0.3).

6 0
3 years ago
in a vehicle you're servicing the fuel pressure drops rapidly when the engine is says that one or more turned off. Technician a
expeople1 [14]

Answer:

Both Technicians A and B  are correct

Explanation:

If the fluid pressure will decrease quickly in a car when the ignition says that one or more has been switched off. One or two could be leaking or the source could be a faulty check mechanism in the catalytic converter.

3 0
4 years ago
A 150-lbm astronaut took his bathroom scale (a spring scale) and a beam scale (compares masses) to the moon where the local grav
kozerog [31]

Answer:

a)Wt =25.68 lbf

b)Wt = 150 lbf

F= 899.59 N

Explanation:

Given that

g = 5.48 ft/s^2.

m= 150 lbm

a)

Weight on the spring scale(Wt) = m g

We know that

1\ lbf=32.17 \ lmb.ft/s^2

Wt = 150 x 5.48/32 lbf

Wt =25.68 lbf

b)

On the beam scale

This is scale which does not affects by gravitational acceleration.So the wight on the beam scale will be 150 lbf.

Wt = 150 lbf

If the plane is moving upward with acceleration 6 g's then the for F

F = m a

We know that

1\ ft/s^2= 0.304\ m/s^2

5.48\ ft/s^2= 1.66\ m/s^2

a=6 g's

a=9.99\ m/s^2

So

F = 90 x 9.99 N

F= 899.59 N

3 0
3 years ago
A cylindrical specimen of a titanium alloy having an elastic modulus of 107 GPa (15.5 × 106 psi) and an original diameter of 3.7
Keith_Richards [23]

Answer:

the maximum length of specimen before deformation is found to be 235.6 mm

Explanation:

First, we need to find the stress on the cylinder.

Stress = σ = P/A

where,

P = Load = 2000 N

A = Cross-sectional area = πd²/4 = π(0.0037 m)²/4

A = 1.0752 x 10^-5 m²

σ = 2000 N/1.0752 x 10^-5 m²

σ = 186 MPa

Now, we find the strain (∈):

Elastic Modulus = Stress / Strain

E = σ / ∈

∈ = σ / E

∈ = 186 x 10^6 Pa/107 x 10^9 Pa

∈ = 1.74 x 10^-3 mm/mm

Now, we find the original length.

∈ = Elongation/Original Length

Original Length = Elongation/∈

Original Length = 0.41 mm/1.74 x 10^-3

<u>Original Length = 235.6 mm</u>

5 0
3 years ago
Other questions:
  • Where the velocity is highest in the radial direction? Why?
    9·1 answer
  • Two previously undeformed cylindrical specimens of an alloy are to be strain hardened by reducing their cross-sectional areas (w
    8·1 answer
  • What is the specific volume of oxygen at 40 psia and 80°F?
    10·1 answer
  • What are examples of professional organizations? Check all that apply. American Institute of Architects Business Professionals o
    12·2 answers
  • A six-lane freeway (three lanes in each direction) in rolling terrain has 10-ft lanes and obstructions 5 ft from the right edge.
    9·1 answer
  • Horizontal shear forces and, consequently, horizontal shear stresses are caused in a flexural member at those locations where th
    6·1 answer
  • 1. What are hand tools ? *
    6·1 answer
  • A semiconductor is a material that can carry an electric current between a ______and an insulator
    11·1 answer
  • 5. Which of the following is false about onStep?
    14·1 answer
  • Develop rough sketches of ideas bridge ​
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!