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If ""^12C is used as standard , the rela...

If `""^12C` is used as standard , the relative mass of an atom of sodium is 23 and the relative mass of an atom of phosphorus is 31 . Find the relative masses of a samples of sodium and phosphorus with respect to each other when each contains `3.0 xx 10^(25)` atoms .

Text Solution

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The relative masses of samples that contain equal numbers of atoms will be the same as the relative masses of individual atoms , thus ,
`("mass of the sample of sodium")/("mass of the sample of phosphorus") = (23)/(31)` .
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Knowledge Check

  • Which of the following samples contain 2.0 xx 10^(23) atoms?

    A
    `8.0 g O_(2)`
    B
    `3.0 g Be`
    C
    `4.0 g C`
    D
    `1.0 g He`

  • If the atomic mass of sodium is 23 , the number of moles in 46gm of sodium is:

    A
    1
    B
    2
    C
    2.3
    D
    4.6

  • The relative atomic masses of all elements have been found with respect to an atom of _______.

    A
    N-14
    B
    O-16
    C
    C-12
    D
    C-16

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