# Chemistry

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An electron moves with a velocity of 2.5 x 10^8 cm/s. What is its wavelength? (The mass of an electron is 9.109 x 10^-28 g.)

• Chemistry -

wavelength = h/mv
m is in kg
v in m/s
wavelength in meters.

• Chemistry -

w = (6.626x10^-34 J*s)/[(9.109x10^-31 kg)(2.5x10^8 m/s)] = 2.91x10^-12 m

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