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The molar mass of a substance , each mol...

The molar mass of a substance , each molecule of which contains 9 C atoms , 13 H-atoms and `3.32xx10^(-23)` g of other component is `(N_A=6.022xx10^23)`

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The correct Answer is:
140.50 to 141.50
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Calculate the mass of the following: (i) 0.5 mole of N_(2) gas (mass from mole of molecule) (ii) 0.5 mole of N atoms (mass from mole of atom) (iii) 3.011 xx 10^(23) number of N atoms (mass from number) (iv) 6.022 xx 10^(23) number of N_(2) molecules (mass from number)

Calculate the mass of the following: (i) 0.5 mole of N_(2) gas (mass from mole of molecule) (ii) 0.5 mole of N atoms (mass from mole of atom) (iii) 3.011 xx 10^(23) number of N atoms (mass from number) (iv) 6.022 xx 10^(23) number of N_(2) molecules (mass from number)

Knowledge Check

  • The weight of 1 molecule of the compound C_(60)H_(122) is...( N_(A)=6.0xx10^(23) )

    A
    `1.4xx10^(-21)g`
    B
    `1.09xx10^(-21)g`
    C
    `5.025xx10^(23)g`
    D
    `16.023xx10^(23)g`

  • Calculate the pOH of a solution at 25^@C that contains 1 xx 10^(-10) M of hydronium ions, i.e. H_3O^+ .

    A
    `4.000`
    B
    `9.0000`
    C
    `1.000`
    D
    `7.000`

  • An electron is at a distance of 10 m from a charge of 10C.Its total energy is 15.6xx10^(-10)J .Its de-Broglie wavelength at this point is ……. (h=6.625xx10^(-34))J.S,m_(2)=9.1xx10^(-31)Kg , K=9xx10^(9)SI)

    A
    9.87 Å
    B
    9.87 fermi
    C
    8.97 Å
    D
    8.97 fermi

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    What is no of O_(2) molecules in 3.2 xx 10^(-15)g sample of oxygen ? .

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    Calculate the energy of electron in orbit in Kj mol^(-1) N_(A) = 6.02 xx 10^(23) per mole

    Calculate the uncertainty in the position of an electron if the uncertainty in its velocity is 5.7 xx 10^5 m//sec (h = 6.626 xx 10^(-34) kg m^2 s^(-1) , mass of the electron = 9.1 xx 10^(−31) kg ).

    An atom has a mass of 0.02kg and uncertainty in its velocity is 9.218xx10^(-0)m//s then uncertainly in position is (h=6.626xx10^(-34)Js)

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