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The de - Broglie wavelength associated w...

The de - Broglie wavelength associated with a hydrogen molecule moving with a thermal velocity of `3 km//s` will be

A

`0.66xx10^(-10) m`

B

`0.33xx10^(-10) m`

C

`10^(-10) m`

D

`2xx10^(-10) m`

Text Solution

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The correct Answer is:
A
`lambda=h/(mv)=(6.63xx10^(-34))/(2xx1.67xx10^(-27)xx3xx10^(3))`
`=0.66xx10^(-10) m`.
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