What is the velocity of an electron which has a De Broglie wavelength of 271.2 pm?

Data:

m_electron = 9.109 x 10^-25 mg

h = 6.626 x 10^-34 kg.m².s^-1

Question

What is the velocity of an electron which has a De Broglie wavelength of 271.2 pm?

Data:

m_electron = 9.109 x 10^-25 mg

h = 6.626 x 10^-34 kg.m².s^-1

| General Chemistry 1

Accepted Answer

λ = $\frac{h}{mv}$

v = $\frac{h}{λm}$

v = $\frac{6.626 \times 10^{- 34}}{(271.2 \times 10^{- 12}) (9.109 \times 10^{- 31})}$ = 2.682 x 10⁶ m.s^-1

Midterm 2 - Question 3 | General Chemistry 1