Question

A) To generate the spectrum above a source capable of producing electromagnetic radiation with an energy of 7 * 10 ^ 4 * k * J per mole of photons was used. Such radiaton is from which region of the electromagnetic spectrum. Justify your answer with a calculation

Answer 1

Answer:

Gamma

Explanation:

I'm not sure how to do it without calculations but:

E=hv

7*10^7 J/mol=6.626*10^34 Js * v

v=1*10^41

Gamma rays.

More here: https://www.hasd.org/faculty/AndrewSchweitzer/spectroscopy.pdf

Answer 2

Answer:

These radiations is from X-rays region of the electromagnetic spectrum.

Explanation:

Energy of the 1 photon =$E=7\times 10^4 kJ/mol$

Energy of the photon :

$E=\frac{7\times 10^4 kJ/mol}{N_A}$

$=\frac{7\times 10^7 J/mol}{6.022\times 10^{23} mol^{-1}}$ (1 kJ=1000 J)

$E=1.1624\times 10^{-16} J$

$E=\frac{hc}{\lambda }$

$\lambda =\frac{6.634\times 10^{-34} Js\times 3\times 10^8 m/s}{1.1624\times 10^{-16} J}$

$E=1.712\times 10^{-9} m = 1.712 nm$

These radiations is from X-rays region(0.1 nm to 10 nm) of the electromagnetic spectrum.