The de Broglie wavelength of an electron is 8.7 × 10^-11 m. The mass of an electron is 9.1 × 10^-31 kg. The velocity of this electron is __________ m/s. A)8.4 × 10^-3 B)1.2 × 10^-7 C)6.9 × 10^-5 D)8.4 × 10⁶

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The de Broglie wavelength formula is λ = h / (mv), where h is Planck's constant (6.626 × 10^-34 Js). Solving for v gives v = h / (mλ). Substituting the given values, v = (6.626 × 10^-34) / (9.1 × 10^-31 × 8.7 × 10^-11) = 8.4 × 10^6 m/s.

The De Broglie Wavelength of an Electron Is 8