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The mass of an electron is 9.1xx10^-31 k...

The mass of an electron is `9.1xx10^-31 kg and its velocity is `812 me^-1`. calculate its wavelength.

A

89.67nm

B

8.967 nm

C

896.7 nm

D

0.8967 nm

Text Solution

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The correct Answer is:
C
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Knowledge Check

  • The mass of an electron is 9.1xx10^(-31) kg and velocity is 2.99xx10^(10) cm s^(-1) . The wavelenth of the electron will be

    A
    0.243 `"Å"`
    B
    0.0243 `"Å"`
    C
    4.21 `"Å"`
    D
    0.421 `"Å"`

  • If mass of an electron is 9.1xx10^(-31) kg, the number of electrons in 1 mg is

    A
    `1.09xx10^(27)`
    B
    `1.09xx10^(24)`
    C
    `9.1xx10^(28)`
    D
    `9.1xx10^(31)`

  • The rest mass of an electron is 9.11xx10^(-31) kg. Molar mass of the electron is

    A
    `1.5xx10^(-31) kg mol^(-1)`
    B
    `9.11xx10^(-31) kg mol^(-1)`
    C
    `5.5xx10^(-7) kg mol^(-1)`
    D
    `6.02xx10^(23) kg mol^(-1)`

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    Which of the following should be the wavelength of an electron if its mass is 9.1xx10^(-31)kg and its velocity is 1//10 of that of light and the value of h is 6.6252xx10^(-24) joule second?

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