A strange lad with a few marbles loose upstairs lives in a small cabin in Montan

Question

A strange lad with a few marbles loose upstairs lives in a small cabin in Montana, referring to himself (always in the third person) as the "Nuka-bomber". The Nuka-Bomber hatches a sinister plan to build a "dirty bomb" by dissolving the 241 Am from 260,000 smoke detectors (1.2 micrograms each) that he surreptitiously removed some time ago from Wal-Mart's main warehouse in Bentonville, AR. How much mass of 241 Am does this represent How many Becquerels of 241 Am were initially present in the 260,000 smoke detectors You will need to find the specific activity for 241 Am using the calculation shown on Slide 27.

Explanation / Answer

2.6 x105detectors x 1.2x10-6g/detector= 0.312 g Am

Specific activity 1.27 x 1011 Bq/g

Initial activity 1.27 x 1011 Bq/g x 0.312 g = 3.96x1010 Bq (round it to 4.0x1010 Bq)

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