Question 7 How many tightly bound molecules could a single ray of frequency 2.63

Question

Question 7 How many tightly bound molecules could a single ray of frequency 2.63 x 1020 Hz break apart? The in the form: N x 105, indicate only N. 10 pts binding energy of such a molecule is 10 eV. Your answer should be a number with two decimal places DQuestion 8 10 pts X-ray photons are produced by electrons accelerated through a potential difference of 97 kV. Determine the wavelength of such a photon in nm. Your answer should be a number with four decimal places, do not include unit. 1nm 10-9 m

Explanation / Answer

Energy of the ray:

Etotal = hf = (6.63*10^-34)(2.63*10^20) = 1.74*10^-13 J

Energyto break one bond:

E = 10eV = 10*1.6*10^-19 J = 1.6*10^-18 J

So,

N = Etotal/E

= 108,845

= 1.09 x 10^5

They have asked to indicate only the N part,

so 1.09

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