Chemistry

You are conducting experiments with your x-ray diffractometer.

(a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg angle, θhkl, at which you can expect to observe reflections from the molybdenum specimen.

DATA:
λKα of Mo = 0.721 Å
lattice constant of Mo, a = 3.15 Å
λKα of Ag = 0.561 Å
lattice constant of Ag, a = 4.09 Å

(b) If you wish to repeat the experiment described in part (a) but using an electron diffractometer, across what vale of potential difference must electrons be accelerated from rest in order to give the identical value for the smallest Bragg angle, θhkl?

posted by Anonymous
2. 3.93

posted by Anonymus
3. 3.93 is correct?

posted by Anonymus
4. no ...

posted by Chemistry ;)
5. a 7.23 is correct

posted by anonim
6. and (b)?

posted by anonymous
7. How did you calculate it?

posted by anonymous
8. What is b) ?

posted by Ling
9. and b) is a voltage, needed to accelerate electrons to get the same.. :)

posted by alex
10. What is the answer to B??

posted by Steve
11. ok, b)

eV=E
To get electrons behave like a waves with the same lenght as 0.561A, we need to give them some impulse p according to de Broglie eq.
and E = p^2/2m..

posted by alex
12. to be honest i don't understand b)
it would be great to get a full detailed info

posted by babol
13. b) 475 ev

posted by babalovic
14. babol, for diffraction we need a wave, and according to de Broglie (and later experiments) any matter behave like a waves with different lengths ( depends on their energy). So actually we make a diffraction of electrons (as a waves) on a Mo surface.

posted by alex
15. Thank you alex and babalovic for B)and anonim for A)

posted by Odesa

Similar Questions

1. chemistry

You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg
2. chemistry

You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg
3. CHEMISTRY

You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg
4. CHEMISTRY

You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg
5. chemistry

You are conducting experiments with your x-ray diffractometer. (a) A specimen of molybdenum is exposed to a beam of monochromatic x-rays of wavelength set by the Kα line of silver. Calculate the value of the smallest Bragg
6. Physics

A specimen has .625 the amount of carbon 14 you would find in a living specimen. How many half-lives has the specimen been through? How old is the specimen?
7. Physics

A specimen has .625 the amount of carbon 14 you would find in a living specimen. How many half-lives has the specimen been through? How old is the specimen?
8. Physics

A specimen has .625 the amount of carbon 14 you would find in a living specimen. How many half-lives has the specimen been through? How old is the specimen?
9. Chemistry

Under the correct conditions, the element molybdenum emits X-rays with a characteristic wavelength of 0.711A (7.11*10^-11m). These X-rays are used in diffraction experiments to determine molecular structures. How fast does an
10. physics

why do x-ray technicians use lead aprons when they are exposed to x-rays while we are exposed to radio waves and are not protected

More Similar Questions