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43 solutions

Isotopes

Q. Naturally occurring silver contains 107Ag (mass 106.9051 amu) and 109Ag (mass 108.9048). The atomic weight of Ag in the Periodic Table is 107.868. Given that the mass abundances of 107Ag and 109Ag must total 100%, what is the percent mass abundance of 107 Ag?

Solved • Jan 9, 2020

Isotopes

Q. Naturally occurring element X exists in three isotopic forms: X-28 (27.979 u, 77.03% abundance), X-29 (28.976 u, 8.00% abundance), and X-30 (29.974 u, 14.97% abundance). Calculate the atomic weight of X.

Solved • Dec 19, 2019

Isotopes

Q. Rubidium has two naturally occurring isotopes. The average mass of Rb is 85.4678 u. If 72.15% of Rb is found as Rb-85 (84.9117 u), what is the mass of the other isotope?

Solved • Dec 18, 2019

Isotopes

Q. Consider the following table of isotopes of silicon. How would you determine the percent abundance of each isotope?

Solved • Dec 14, 2019

Isotopes

Q. Boron has two naturally occurring isotopes, 10B and 11B, which have masses 10.0129 and 11.0093 amu, respectively. Given the average atomic mass of boron (10.81 amu), determine the percent abundance of each isotope.

Solved • Dec 14, 2019

Isotopes

Q. 9. Identify the number of protons, neutrons, and electrons in the following:

Solved • Nov 21, 2019

Isotopes

Q. 9. Identify the number of protons, neutrons, and electrons in the following:

Solved • Nov 21, 2019