Arsenic-76 decays by beta emission, If 1.8x10 mol of 70As emits 2.1x1012 beta particles per second, find the specific activity in Ci/g (1 Ci = 3.7x1010 d/s). 4.15x10 17x10 3.15x10 3.70x1010 154x10

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Arsenic-76 decays by beta emission. If 1.8x10 mol of 76As emits 2.1x1012 beta particles per
second, find the specific activity in Ci/g (1 Ci = 3.7x1010 d/s).
4.15x10
1.17x100
3.15x10
3.70x1010
1.54x10
Transcribed Image Text:Arsenic-76 decays by beta emission. If 1.8x10 mol of 76As emits 2.1x1012 beta particles per second, find the specific activity in Ci/g (1 Ci = 3.7x1010 d/s). 4.15x10 1.17x100 3.15x10 3.70x1010 1.54x10
Lead-200 decays to Thallium-200 by positron emission. The half-life of Pb-209 is 22 hours.
What is the decay constant (3 significant figures) in h'2 0.0315
How long in hours (2 significant figures) will it take to form 7.7 grams of TI-200 from 14.3 grams
of Pb-200? 4.2
Do not include units.
Transcribed Image Text:Lead-200 decays to Thallium-200 by positron emission. The half-life of Pb-209 is 22 hours. What is the decay constant (3 significant figures) in h'2 0.0315 How long in hours (2 significant figures) will it take to form 7.7 grams of TI-200 from 14.3 grams of Pb-200? 4.2 Do not include units.
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