Chemistry
posted by Bill on .
Assuming that the smallest measurable wavelength in an experiment is 0.330 fm (femtometers), what is the maximum mass of an object traveling at 157 m·s^–1 for which the de Broglie wavelength is observable?
mass = ? kg

wavelength = h/mv
Substitute wavelength (in meters) with v = m/s and solve for mass in kg. 
I don't get the equation.

Assuming that the smallest measurable wavelength in an experiment is 0.650 fm (femtometers), what is the maximum mass of an object traveling at 563 m·s–1 for which the de Broglie wavelength is observable?