2a) What is the de Broglie wavelength of a neutron (m = 1.67 ´ 10-27 kg) which has a speed of 5.0 m/s.   λ=h/mv h = 6.63 x 10-34J-s Group of answer choices a)162 nm b)395 nm c)79 nm d)529 nm 2b) How much energy would be released as an electron moved from the n = 4 to the n = 3 energy level? /\ E = 2.19 x 10-18 (1/ni2 - 1/nf2) Group of answer choices a)3.981 x 10^ -18 J b)2.043 x 10 ^-18 J c)1.06 x 10^-19J d)1.938 x 10 ^-18 J

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