A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 2.10×105 Bq. How many atoms of 223Ra are present?
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A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 2.10×105 Bq. How many...
A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 5.30×105 Bq. How many atoms of 223Ra are present? How many moles of 223Ra are present?
A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 8.80×105 Bq. 1st attempt Part 1 (1 point) How many atoms of 223Ra are present? Part 2 (1 point)Feedback How many moles of 223Ra are present?
A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 5.20×105 Bq. 1st attempt Part 1 (1 point)See HintSee Periodic Table How many atoms of 223Ra are present? atoms Part 2 (1 point) How many moles of 223Ra are present? moles
this is the first question its just my second attempt a See page 935 08 Question (2 points) A sample containing 223Ra (t12 11.4 days) has an activity of 6.60x105 Bq. 2nd attempt Part 1 (1 pt) See Periodic Table See Hint How many atoms of 223Ra are present? 12 atoms x 10 1.3 Part 2 (1 pt) How many moles of 223Ra are present? x 10-2 moles 2.15
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5. A sample with 4.0x 1015 atoms has an activity of 3.50 1012 Bq. It has a half-life of 600 years (a) How much is the decay constant? (2 marks) (b) How much time will it take to drop to one-quarter of its original amount? (2 marks)
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What's this nuclide's half-life? A radioactive sample containing 1.20×1017 nuclei has activity 2.45×1012 Bq .
A sample of radioactive material contains 1.1E15 atoms and has an activity of 6.3E11 Bq. What is its half-life? A sample of radioactive material contains 1.1 x 1015 atoms and has an activity of 6.3 x 1011 Bq. What is its half-life? 1.16E3 X Your response is within 10% of the correct value. This may be due to roundoff error, or you could have a mistake in your calculation. Carry out all intermediate results to at least four-digit accuracy to...