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27 May, 15:02

5. The element copper has naturally occurring isotopes with mass numbers of 63

and 65. The relative abundance and atomie masses are 69.2% and 30.8%

respectively. Calculate the average atomic mass of copper,

+5
Answers (2)
  1. 27 May, 15:08
    0
    63.616

    Explanation:

    DATA

    1. first atomic mass; m1=63

    second atomic mass; m2=65 first percentage; p1 = 69.2% second percentage me; p2=30.8% average mass; avg=?

    SOLUTION

    avg = (m1) (p1) + (m2) (p2)

    100

    avg = (63) (69.2) + (65) (30.8)

    100

    avg = 4359.6 + 2002

    100

    avg = 6361.6

    100

    avg = 63.616
  2. 27 May, 15:26
    0
    63.616

    Explanation:

    you calcute to get the results
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