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Bromine has two common isotopes: Br79 and Br81. If these two isotopes are almost equally abundant (i.e., an abundance of 50% each), what is the

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Bromine has two common isotopes: Br79 and Br81. If these two isotopes are almost equally abundant (i.e., an abundance of 50% each), what is the weighted average mass of a sample of bromine atoms? (Calculate the answer based on this information and do not us the periodic table.) Part 2 (1 point) The actual weighted atomic mass of bromine is 79.904u. Which isotope is slightly more abundant

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