# Chemistry

At what speed must a neutron travel to have a wavelength of 9.2 pm?

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1. wavelength = h/mv
h = Planck's constant
m = mass in kg
v is velocity in m/s

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2. So the solution to the problem is v= wavelength x h/m?

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3. nope

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4. is it V=h/m x wavelength

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5. yes.

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6. I put into my calculator (6.626e-34)/(9.109e-31)(0.92e-11)= 6.69e-15 m/s but it is wrong, so what did I mess up?

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