A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 5.30×105 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?
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A sample containing 223Ra (t1/2 = 11.4 days) has an activity of
5.30×105 Bq. How many...
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 2.10×105 Bq. How many atoms of 223Ra are present?
A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 5.20×105 Bq. 1st attempt...
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
A sample containing 223Ra (t1/2 = 11.4 days) has an activity of 8.80×105 Bq. 1st attempt...
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?
this is the first question its just my second attempt a See page 935 08 Question...
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
Find the activity of a sample containing 4.52 1014 iodine-131 nuclei (T1/2 = 8.0 days).
Find the activity of a sample containing 4.52 1014 iodine-131 nuclei (T1/2 = 8.0 days).
A chemistry laboratory has a bottle containing 6.94•105 mg of H3AsO4. a. How many moles of...
A chemistry laboratory has a bottle containing 6.94•105 mg of H3AsO4. a. How many moles of oxygen are in this bottle? b. How many hydrogen atoms are in this bottle?
5. A sample with 4.0x10'15 atoms has an activity of 3.50x 1012 Bq. It has a...
5. A sample with 4.0x10'15 atoms has an activity of 3.50x 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)
5. A sample with 4.0x 1015 atoms has an activity of 3.50 1012 Bq. It has...
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)
A sample of radioactive material is initially found to have an activity of 114 Bq. After...
A sample of radioactive material is initially found to have an activity of 114 Bq. After 4 days and 5 hours, the activity of the sample is found to be 85 Bq. 1) Calculate the disintegration constant of this material. 1 = 51 Submit 2) Calculate the half-life of the material. T12- days Submit 3) How long from the beginning (when the activity was 114 Bq) did it take for the sample to reach an activity of 10 Bq? t...
What's this nuclide's half-life? A radioactive sample containing 1.20×1017 nuclei has activity 2.45×1012 Bq .
What's this nuclide's half-life? A radioactive sample containing 1.20×1017 nuclei has activity 2.45×1012 Bq .
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
5. A sample with 4.0x10'15 atoms has an activity of 3.50x 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)
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)
A sample of radioactive material is initially found to have an activity of 114 Bq. After 4 days and 5 hours, the activity of the sample is found to be 85 Bq. 1) Calculate the disintegration constant of this material. 1 = 51 Submit 2) Calculate the half-life of the material. T12- days Submit 3) How long from the beginning (when the activity was 114 Bq) did it take for the sample to reach an activity of 10 Bq? t...
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