Answer to Question #54351 in General Chemistry for kayla

Question

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?

Answer 1

The number of C-13 atoms equals:
N(C13) = (1100 × 1.07 %)/100% = 11.77 ≈ 12 atoms