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.

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Presentation transcript:

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= amu) and Cu-65 (abundance= 30.8%, mass= amu) Calculate the atomic mass of copper..692 x = x = 20.0

x.7899 = x.1000 = x.1101 = amu 24. Three magnesium isotopes have atomic masses and relative abundances of amu (78.99%), amu (10.00%), and (11.01%). Calculate the atomic mass of magnesium

Practice Problem Silver is found in two isotopes with atomic masses amu and amu, respectively. The first isotope represents 51.82% and the second 48.18%. Determine the average atomic mass of silver (0.5182) (0.4818) = amu