Problem: The mole is defined as the amount of a substance containing the same number of particles as exactly 12 grams of C-12. The amu is defined as 1/12 of the mass of an atom of C-12.Why is it important that both of these definitions reference the same isotope?

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mole is defined as the amount of a substance containing the same number of particles as exactly 12 grams of C-12

amu is defined as 1/12 of the mass of an atom of C-12


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The mole is defined as the amount of a substance containing the same number of particles as exactly 12 grams of C-12. The amu is defined as 1/12 of the mass of an atom of C-12.

Why is it important that both of these definitions reference the same isotope?

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