# Chemistry

posted by .

Under appropriate conditions, molybdenum emits X rays that have a characteristis wavelength of 0.711 Angstrom.
These X rays are used in diffraction experiments to dtermine the structures of molecules. How fast would an electron have to be moving in order to have the same wavelength as these X rays?

The answer is V= 1.02x10^7 m/s

My question: At first I tried converting Angstroms to Meters and then using the formula V= C/Lambda, in which C is 3x10^7m/s and Lambda would be the Angstroms I coverted, however the m's x-out and then I would only have s....so I need some help!

• Chemistry -

Use the deBroglie hypothesis

wavelength= h/mv

solve for v.

By the way, the speed of light in free space is 3*108, not 107 m/s

## Similar Questions

1. ### 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 electron …
2. ### chemistry

Calculate the interplanar spacing (in picometers) that corresponds to defracted beams of X rays at รจ = 24.0o, if the X rays have a wavelength of 127. pm. Assume n = 1 _____pm
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 angle, …
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 angle, …
5. ### Algebra I

Here is the question. Medical X-rays, with a wavelength of about 10^-10m, can penetrate completely through your skin. a. Ultraviolet rays, which cause sun burn by penetrating only the top level of skin, have a wavelength about 1000 …
6. ### Science HW - - - check my answers?

1. Compare the two light waves above. Which wave would produce the brightest light and which wave would have the least energy?
7. ### Science

What is true about X-rays and microwaves?