Radiation Activity: What mass of 14C, with a half-life of 5730 y, do you need to provide a decay rate of 280.0 Bq? The mass of 14C is 14.00 u, and 1 u = 1.6605 × 10-27 kg.
A. 1.70 × 10-12 kg
B. 5.38 × 10-19 kg
C. 3.84 × 10-20 kg
D. 8.68 × 10-13 kg
Answer: A
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