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If one mole of carbon atoms weighs 12 gr...

If one mole of carbon atoms weighs 12 grams, what is the mass (in grams) of 1 atom of carbon?

Text Solution

Verified by Experts

Molecular mass of carbon = 12 g
`6.022 xx 10^(23)` atoms of carbon have mass = 12 g .
`therefore` 1 atom of carbon has mass
`= 12/(6.022 xx 10^(23)) = 1.99 xx 10^(-23) g`
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Knowledge Check

  • One mole of carbon atom weighs 12g, the number of atoms in it is equal to, ( Mass of carbon-12 is 1.9926xx10^(-23)g )

    A
    `1.2xx10^(23)`
    B
    `6.022xx10^(22)`
    C
    `12xx10^(22)`
    D
    `6.022xx10^(23)`

  • Calculate the mass (in grams) of a single C-12 atom.

    A
    `1.993xx10^(-23)g`
    B
    `2.875xx10^(-23)g`
    C
    `4.162xx10^(-23)g`
    D
    `3.786xx10^(-23)g`

  • This section contains Assertion (A) One atomic mass unit is defined as one twelfth of the mass of one carbon -12 atom. Reason ( R) Carbon -12 isotope is the most abundant isotope of carbon and has been chosen as standard.

    A
    Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion
    B
    Both Assertion and reason are correct but Reason is not the correct explanation of Assertion
    C
    Assertion is correct but Reason is incorrect.
    D
    Both Assertion and Reason are incorrect

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