Problem: 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 2.1000×104-atom sample of carbon?

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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 2.1000×104-atom sample of carbon?

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