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Rubidium is a soft, silvery-white metal that has two common isotopes, Rubidium-85 and Rubidium-87. If the abundance of Rubidium-85 is 72.2% and Rubidium-87 is 27.8%, what is the average atomic mass?.

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  1. Rubidium is a soft, silvery-white metal that has two common isotopes, Rubidium-85 and Rubidium-87. If the abundance of Rubidium-85 is 72.2% and Rubidium-87 is 27.8%, what is the average atomic mass?

  2. Uranium is used in nuclear reactors and is a rare element on earth. It has 3 common isotopes: Uranium-234 is 0.01% abundant, Uranium-235 is 0.71% abundant and Uranium-238 is 99.28% abundant. What is the average atomic mass of Uranium?

  3. Titanium has five common isotopes: (7.8%), (73.4%), (5.5%) and (5.3%). What is the average atomic mass of titanium?

  4. Naturally occurring chlorine that is put in pools is 75.53 percent and 24.47 percent Calculate the average atomic mass.

  5. Magnesium consists of three naturally occurring isotopes. The percent abundance of these isotopes is as follows: (78.70%), (10.13%), and (11.7%). Determine the average atomic mass.

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