13. Imaginary element mccourtium has an average atomic mass of 157.22 u. The atomic masses and % abundance of three of its four isotopes are given in the table below. Isotope Atomic Mass (u) % Abundance Mc-154 154.80 2.6 Mc-155 155.20 8.2 Мc-157 157.40 81.3 Мc-158 ?? ?? a) Using the data in the table, calculate the % abundance of the Mc-158 isotope. (Show your work.) b) Using the data in the table, as well as your result from part a, calculate the atomic mass of the Mc-158 isotope. (Show your work.) (Be careful when substituting - what is your unknown in the equation this time, and what do you already know?)

13. Imaginary element mccourtium has an average atomic mass of 157.22 u. The atomic masses and % abundance of three of its four isotopes are given in the table below. Isotope Atomic Mass (u) % Abundance Mc-154 154.80 2.6 Mc-155 155.20 8.2 Мc-157 157.40 81.3 Мc-158 ?? ?? a) Using the data in the table, calculate the % abundance of the Mc-158 isotope. (Show your work.) b) Using the data in the table, as well as your result from part a, calculate the atomic mass of the Mc-158 isotope. (Show your work.) (Be careful when substituting - what is your unknown in the equation this time, and what do you already know?)

Chemistry

9th Edition

ISBN:9781133611097

Author:Steven S. Zumdahl

Publisher:Steven S. Zumdahl

Chapter2: Atoms, Molecules, And Ions

Section: Chapter Questions

Problem 44E: Indium oxide contains 4.784 g of indium for every 1.000 g of oxygen. In 1869, when Mendeleev first...

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