Assuming the nitrogen molecule is moving with r.m.s. velocity at 400 K, the de-Broglie wavelength
of nitrogen molecule is close to :
(Given : nitrogen molecule weight : 4.64 10^–26 kg,
Boltzman
constant: 1.38 10^–23 J/K,
Planck constant : 6.63 10^–34 J.s)