Question

8. The length between chemical bonds is -1 A. To perform diffraction studies on bonds, you would practically need to use a particle with a wavelength that is about 1/100th this value, i.e. 1x10-12 m. Note that this imparts a 1% error in measuring the length of a chemical bond with an electron. What speed do you need to make electrons travel at to give them this wavelength such that they can be used in diffraction experiments for elucidating the structure of molecules? Hint: A = Also the electron rest mass is 9.109 *10-31 kg. (2 pts)

Answer 1

8. we shall utilise the de Broglie Wavelength equation for this problem wegg) 18 a no heh....(1). mu niven a 10-12 m h = 6.624 x 10 kg-ms- in m = 9:109x10-31 kg Putting these values in ; V hos63627 x 1034 9.10.9.x.10-31 x 10-12 6.627 i 10-34 9. 109 x 10-43 6.627 x 10 9 ore 16 6.27 X 108 9 10 9 7. 245 x 106 met o 9.109 should be 7.275 x 108 msl. Hence, the velocity