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If the entire mass of the body (45.5 kg)...

If the entire mass of the body (45.5 kg) is assumed to be made up of electrons, how many electrons are present in mass of an electron is `9.1 xx 10^(-31) kg`?

Text Solution

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(i) If there are n number of electrons in it and mass of each electron is x, the total mass of the substance is nx.
(ii) `5 xx 10^(31)`
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Knowledge Check

  • If maximum velocity with which an electron can be emitted is (mass of electron =9xx10^(-31) kg)

    A
    30 volt
    B
    45 volt
    C
    59 volt
    D
    Information is insufficient

  • 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)`

  • If mass of one electron is 9.11xx10^(-26) then how many electrons will be there in 1 g of electrons?

    A
    `1.10xx10^(25)`
    B
    `1.093xx10^(23)`
    C
    `110xx10^(-27)`
    D
    `0.1093xx10^(28)`

    • Similar Questions

    Explore conceptually related problems

    Calculate the change in mass of an object if 800 electrons are given to it Given: Mass of an electron is 9.1xx10^(-31) kg .

    Calculate the de Broglie wavelength of an electron moving with a velocity of 0.3c. Rest mass of an electron is 9.1xx10^(-31)kg.

    The mass of half mole of electrons is about (Given: Mass of electron =9.1 xx10^(-28) g)

    Compute the difference in masses of 10^(3) moles of each of magnesium atoms and magnesium ions. (Mass of an electron =9.1 xx 10^(-31) kg)

    Determine the de Broglie wavelength of a proton, whose kinetice energy is equal to the rest of the mass energy of an electron. Given that the mass of an electron is 9xx10^(-31) kg and the mass of a proton is 1837 times as that of the electron.

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