Question

how many tightly bound molecules could a single ray of frequency 2.77 x 1020 hz break apart? the binding energy of such a molecule is 10 ev. your answer should be a number with two decimal places in the form: n x 105, indicate only n.

Answer 1

E = h ν

E = 6.63E-34 * 2.77E20 = 1.84E-13 energy of incident beam

1 eV = 1.60E-19 10 eV = 1.60E-18 Joules

n = 1.84E-13 / 1.60E-18 = 1.15E5

n = 1.15