Carbon has two naturally occurring isotopes: C-12 (natural abundance is 98.93%) and C-13 (natural abundance is 1.07%).How many C-13 atoms are present, on average, in a 1100-atom sample of carbon?
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Expert's answer
2015-09-02T05:44:36-0400
The number of C-13 atoms equals: N(C13) = (1100 × 1.07 %)/100% = 11.77 ≈ 12 atoms
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