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Bromine has two stable isotopes (79Br and 81Br) with masses of 78.918338 u and 80.916291 u. The average molar mass of Br is 79.90 u. What is the percent abundance of 81Br? (Give your answer to two decimal figures.) | Broom het twee stabiele isotope (79Br en 81Br) met massas van 78.918338 u en 80.916291 u. Die gemiddelde molêre massa van Br is 79.90 u. Wat is die persentasie voorkoms van 81Br? (Gee jou antwoord tot twee desimale syfers.) |
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