12. Rubidium is a soft, silvery-white metal that has two common isotopes, Rb and "Rb. If the abundance of Rb is 80.2% and the abundance of 7Rb is 19.8%, what is the average atomic mass of rubidium?

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10. The natural abundance for boron isotopes is 19.9% 1°B and 80.1% "B. Calculate boron's atomic mass.
10.801 AMU
11. Hydrogen is 99% 'H, 0.8% ?H, and 0,2% ³H. Calculate its average atomic mass.
126.86 AMU
12. Rubidium is a soft, silvery-white metal that has two common isotopes, Rb and 87Rb. If the abundance
of 5Rb is 80.2% and the abundance of 87RD is 19.8%, what is the average atomic mass of rubidium?
13. What is the atomic mass of hafnium if, out of every 100 atoms, 5 have a mass of 176, 19 have a mass
of 177, 27 have a mass of 178, 14 have a mass of 179, and 35 have a mass of 180.0?
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Transcribed Image Text:Atomic Mass. How tO E Group B- Atomic Structure Part E isotope practice - Google Docs ge Isotopic Abundance Pre X BETA i docs.google.com/document/d/1D5DXM 2yc08hRFKxk9KPoLCFBcav63bWjQLS5fr14bl/edit O MathBitsNotebook.. E Topic: Apostrophes C Infinite Campus E Canvas G Discovery Education ookmarks Q Your Sets | Quizlet | isotope practice O Last edit was 7 minutes ago File Edit View Insert Format Tools Add-ons Help E - .. GD Cambria BIU A 12 100% - Normal text | 14 2 10. The natural abundance for boron isotopes is 19.9% 1°B and 80.1% "B. Calculate boron's atomic mass. 10.801 AMU 11. Hydrogen is 99% 'H, 0.8% ?H, and 0,2% ³H. Calculate its average atomic mass. 126.86 AMU 12. Rubidium is a soft, silvery-white metal that has two common isotopes, Rb and 87Rb. If the abundance of 5Rb is 80.2% and the abundance of 87RD is 19.8%, what is the average atomic mass of rubidium? 13. What is the atomic mass of hafnium if, out of every 100 atoms, 5 have a mass of 176, 19 have a mass of 177, 27 have a mass of 178, 14 have a mass of 179, and 35 have a mass of 180.0? Sign out novo %23 %24 & 2 3 4. 6 7 8 9. e t u b n m
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