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Question

Calculate the wavelength associated with an electron moving with a velocity of 1010cm/s.


A
0.072A
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B
0.829A
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C
0.667A
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D
1.009A
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Solution

The correct option is A 0.072A
Given : 
Planck's constant(h)=6.63×1027ergsVelocity of electron (v)=1010cm/s
We know that:
Mass of electron(me)=9.1×1028g
de Broglie wavelength(λ)=hmv=6.63×10279.1×1028×1010=7.28×1010cm=0.072A

Chemistry

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