The momentum of radiation of wavelength 0.33 nm is ... kg m sec^-1.

$\mathrm{mu}=\frac{\mathrm{h}}{\mathrm{\lambda }}$

wavelength given is 0.33 nm = 0.33 x 10^-9 m

We know that λ = h/p, where λ is the wavelength expressed in metres,

h is the Planck's constant which is = 6.63 x 10^-34 m² kg /s

and p is the momentum.

So, p = h/λ

           = 6.63 x 10^-34/0.33 x 10^-9 = 2 x 10^-24 kg m/s.