A hypothetical element X has 3 naturally occurring isotopes: 41.20 % of 21x, with an atomic weight of 21.016 amu, 24.66% of 22x, with an atomic weight of 21.942 amu, and 34.14% of 24X, with an atomic weight of 23.974 amu. On the basis of these data. calculate the average atomic weight of element X. Report your answer to two decimal places. amu

A hypothetical element X has 3 naturally occurring isotopes: 41.20 % of 21x, with an atomic weight of 21.016 amu, 24.66% of 22x, with an atomic weight of 21.942 amu, and 34.14% of 24X, with an atomic weight of 23.974 amu. On the basis of these data. calculate the average atomic weight of element X. Report your answer to two decimal places. amu

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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An unknown element is determined to have two naturally occurring isotopes. Isotope 1 is 68.11% abundant and has a mass of 68.925580 amu, and isotope 2 has a mass of 70.9247005 amu. Determine the atomic mass of the unknown element. Express your answer to four significant figures.
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Using the following data, determine the percent abundance of the third isotope and the average atomic mass of isotope X. Give as a percentage. X-22 atomic mass = 22.10498 abundance = 52.3985% X-23 atomic mass = 23.0005 abundance = 24.8731% X-24 Atomic mass = 24.0593
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1- For each of the following atoms, calculate the number of protons and neutrons in the nucleus and the number of electrons outside the nucleus (assume neutral atoms). element number of number of number of electrons mass number (A) symbol 126C protons (Z) neutrons 12 10 12 10 14 27 10 23,1Na 11 17 18 2- Calculate the atomic mass to four significant figures for carbon, given the following data: Isotope Exact Atomic Mass (amu) 12.00000 13.00335 Abundance in Nature (%) 98.89 1.110 12C 13C
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