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25 April, 00:38

The element chlorine has two naturally occurring isotopes. About 75% of chlorine isotopes are Cl35 and about 25% are Cl37. What is the average atomic mass of chlorine atoms?

A. 35.45 amu

B. 36.45 amu

C. 37.45 amu

D. 38.45 amu

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Answers (1)
  1. 25 April, 00:51
    0
    (75% of 35) + (25% of 37)

    0.75*35 + 0.25*37 = 35.5

    35.50 amu
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