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7. ( 6pts) Magnesium has three naturally occurring isotopes, magnesium-24 (atomic mass 23.98504 amu, abundance 78.99% ), magnesium-25 (atomic mass 24.98584amu, abundance 10.00% ), and

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7. ( 6pts) Magnesium has three naturally occurring isotopes, magnesium-24 (atomic mass 23.98504 amu, abundance 78.99% ), magnesium-25 (atomic mass 24.98584amu, abundance 10.00% ), and magnesium-26 (atomic mass 25.98259 amu, abundance =11.01% ). Calculate the atomic weight of magnesium 8. (8 pts) Determine the empirical formula of a compound composed of 22.44%C,2.83%H, and 74.73%0 by mass

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