Question

he speed of the proton is one hundredth of the speed of light in vacuum. What is the de Broglie wavelength? Assume that one mole of protons has a mass equal to one gram, $h = 6.626 \times 1{0 - 27}_{}erg\sec$

• A. 3.31 × $1{0 - 3}_{}Å$
• B. 1.33 ×$1{0 - 3}_{}Å$
• C. 3.13 × 10$- 2Å$
• D. 1.31 × $1{0 - 2}_{}Å$

Answer 1

Answer: (B)

1.33 ×$1{0 - 3}_{}Å$

Answer 2

$m = \frac { 1 } { 6.023 \times 10 ^ { 23 } } g$ =

$1.33 \times 1{0 - 11}_{}cm$