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why does the number of nucleons equal the mass of an element which is also 1 mole? Watch

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    yup
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    (Original post by p29)
    yup
    The mass number (M) is the same as the total number of nucelons. \mathrm{mol=\frac{mass}{M} \Rightarrow mol \times M =mass} so when there is one mol, the M is the mass.

    (Original post by alow)
    12g of C-12 contains 1 mol of atoms, meaning a mole of a nucleon will have a mass of 1g as it is 1/12 of the mass of C-12
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