Answer:
v=9.98*10⁻⁴m/s
Explanation:
From De Broglie's wavelength equation which is expressed as
λ=h/p
where h=planks constant, with value 6.626*10⁻³⁴J
p is the momentum expressed as p=mv
where m=mass and v=velocity. Hence we can rewrite the wavelength equation as
λ=h/mv
mass of hydrogen is given as m=1.66*10⁻²⁴kg
hence if we make the speed the subject of formula we have
V=h/mλ
V=(6.626*10⁻³⁴J)/(1.66*10⁻²⁴kg*400*10⁻⁹)
v=9.98(10⁻³⁻³⁴⁺²⁴⁺⁹)
v=9.98*10⁻⁴m/s
