The variables for this experiment include the physical properties of the solutions and the pH of each solution. Use the drop-dow
n menus to complete the sentences and identify the independent and dependent variables. The independent variable, the one that is intentionally manipulated, is . a)the pH of the solutions b) the physical properties c) the system of measurement The dependent variable, the one that you measure the response in, is . a) the pH of solutions b) the physical properties c) the system of measurement
2 answers:
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Answer:
Percentage abundance of 121 Sb is = 57.2 %
Percentage abundance of 123 Sb is = 42.8 %
Explanation:
The formula for the calculation of the average atomic mass is:
Given that:
Since the element has only 2 isotopes, so the let the percentage of first be x and the second is 100 -x.
For first isotope, 121 Sb :
% = x %
Mass = 120.9038 u
For second isotope, 123 Sb:
% = 100 - x
Mass = 122.9042 u
Given, Average Mass = 121.7601 u
Thus,
Solving for x, we get that:
x = 57.2 %
<u>Thus, percentage abundance of 121 Sb is = 57.2 % </u>
<u>percentage abundance of 123 Sb is = 100 - 57.2 % = 42.8 %</u>