1) The image at right shows some of the energy levels of tyrosine. The lower two

Question

1)
The image at right shows some of the energy levels of tyrosine. The lower two levels are each occupied by two electrons. From what you know about the absorption spectrum of tyrosine, what is the magnitude of the energy gap between electronic energy levels B and C?

Select one:

8.84 × 10-19 J

1.63 × 10-18 J

1.53 × 10-19 J

4.23 × 10-18 J

7.31 × 10-19 J

1)
The image at right shows some of the energy levels of tyrosine. The lower two levels are each occupied by two electrons. From what you know about the absorption spectrum of tyrosine, what is the magnitude of the energy gap between electronic energy levels B and C?

Explanation / Answer

B to C

level 4 to 2

Apply Rydberg Formula

E = R*(1/nf^2 – 1/ni ^2)

R = -2.178*10^-18 J

Nf = final stage/level

Ni = initial stage/level

E = Energy per unit (i.e. J/photon)

E = (-2.178*10^-18)*(1/4^2 – 1/3^2)

E = 1.058*10^-19 J

nearest answer is 1.53 × 10-19 J

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