Average Mass Activity Find the average mass of all the spheres in the tray. You may: -Make no more...
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Transcript of Average Mass Activity Find the average mass of all the spheres in the tray. You may: -Make no more...
Average Mass Activity
Find the average mass of all the spheres in the tray. You may:
-Make no more than 3 mass measurements.-Mass only 1 sphere at a time
Record all measurements and show your work. Explain what you did and all assumptions.
63.5 amu
23. Calculate Copper has two isotopes: Cu-63 (abundance=69.2%, mass=62.930 amu) and Cu-65 (abundance= 30.8%, mass=64.928 amu) Calculate the atomic mass of copper..692 x 62.930 =
43.5 .308 x 64.928 = 20.0
23.985 x .7899 = 18.95 24.986 x .1000 = 2.49925.982 x .1101 = 2.861 24.31 amu
24. Three magnesium isotopes have atomic masses and relative abundances of 23.985 amu (78.99%), 24.986 amu (10.00%), and 25.982 (11.01%). Calculate the atomic mass of magnesium
Practice Problem Silver is found in two isotopes with atomic masses 106.9041 amu and 108.9047 amu, respectively. The first isotope represents 51.82% and the second 48.18%. Determine the average atomic mass of silver.106.9041(0.5182) + 108.9047(0.4818) = 107.87 amu
55.40 + 52.47