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PLEASE HELP!! What is the WEIGHTED average atomic mass of this element?

An isotope with mass 185 amu is 19% abundant
An isotope with mass 180 amu is 81% abundant

User Syno
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Hello. This is Mr. Biederman, your science teacher at Insight School of Michigan. You are obviously one of my students. Posting content here is against school policy. Just ask me directly for help. I am always happy to help with anything!

User Tupui
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