Element X has two isotopes. If 72.0% of the element has an atomic mass of 84.9 atomic mass units, and 28.0% of the element has an atomic mass of 87.0 atomic (72.0 + 84.9) × (28.0 + 87.0) mass units, the average atomic mass of element x is equal to which of the Following? 72.0 x 84.9 28.0 x 87.0 100 100 (72.0 × 84.9) + (28.0 × 87.0) (72.0 – 84.9) × (28.0 + 87.0) CLEAR ALL
Element X has two isotopes. If 72.0% of the element has an atomic mass of 84.9 atomic mass units, and 28.0% of the element has an atomic mass of 87.0 atomic (72.0 + 84.9) × (28.0 + 87.0) mass units, the average atomic mass of element x is equal to which of the Following? 72.0 x 84.9 28.0 x 87.0 100 100 (72.0 × 84.9) + (28.0 × 87.0) (72.0 – 84.9) × (28.0 + 87.0) CLEAR ALL
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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Question
Transcribed Image Text:8. Element Xhas two isotopes. If 72.0% of the element has an atomic mass of 84.9
(72.0 + 84.9) x (28.0 + 87.0)
atomic mass units, and 28.0% of the element has an atomic mass of 87.0 atomic
mass units, the average atomic mass of element X is equal to which of the
following?
72.0 x 84.9
28.0 x 87.0
100
100
(72.0 x 84.9) + (28.0 × 87.0)
(72.0 – 84.9) x (28.0 + 87.0)
CLEAR ALL
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