![Phas half life of 1.23 x 10 second. [Ans: 1.41x1017nuclei, 7.9x 1010 decay/s, 1.2x1016nuclei] If we have 7.5 ug sample P-32 i](http://img.homeworklib.com/questions/1b0be910-73c0-11ea-b3a2-0dceb60625f3.png?x-oss-process=image/resize,w_560)
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Phas half life of 1.23 x 10 second. [Ans: 1.41x1017nuclei, 7.9x 1010 decay/s, 1.2x1016nuclei] If we...
The half-life of a radioactive isotope is 2.5 min. If there are initially 48 Times 10^32...
The half-life of a radioactive isotope is 2.5 min. If there are initially 48 Times 10^32 atoms of this isotope, (a) the number of atoms of this isotope remaining after 15 min is: 12 Times 10^32 7.5 Times 10^31 3 Times 10^32 6 Times 10^4 3 Times 10^2 (b) what is the decay constant? (c) What is the initial activity?
Radioactive Decay - Half-life and Activity 1 Radioactive decay - Half-life Time 0 1000 21 31...
Radioactive Decay - Half-life and Activity 1 Radioactive decay - Half-life Time 0 1000 21 31 750 N 1.000.000 500,000 250,000 125,000 62,500 31.250 15.625 7813 3.506 1.953 977 51 6 500 7 BI . 101 250 125 0 tie 21.234.41516171819, 1012 Time in multiples of A radioactive sample's half-life is 30.2 years. 1 year = 365 days, 1 day = 24 hours, 1 hour - 60 minutes, 1 minute = 60 seconds (a) Find its decay constant in year...
Rubidium-87 decays by ß production to strontium-87 with a half life of 4.7 x 1010 years....
Rubidium-87 decays by ß production to strontium-87 with a half life of 4.7 x 1010 years. What is the age of a rock sample that contains 104.9 ug 7Rb and 4.3 ug 87Sr? years old Assume that no 87Sr was present when the rock was formed. The atomic masses are given in the table below: Nuclide Atomic Mass 87Rb 86.90919 87Sr 86.90888
The half-life of 27Mg is 9.50 min. (a) Initially there were 4.10 × 101227Mg nuclei present. How ...
The half-life of 27Mg is 9.50 min. (a) Initially there were 4.10 × 101227Mg nuclei present. How many 27Mg nuclei are left 25.5 min later? Please give your answer to 2 significant figures. b) Calculate the 27Mg activities (in Ci) at t = 0 and t = 25.5 min. t= 0 __Ci t= 25 __ Ci
CHEMWORK Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010...
CHEMWORK Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the age of a rock sample that contains 109.8 ug 87Rb and 4.8 ug 87 1Sr? years old Assume that no 875r was present when the rock was formed. The atomic masses are given in the table below: Nuclide Atomic Mass 87Rb 86.90919 8781 86.90888 Submit Show Hints
11. Radiometric dating a. If 226Ra has a half-life of 1600 years, what is its decay...
11. Radiometric dating a. If 226Ra has a half-life of 1600 years, what is its decay constant in units of s1? Knowing that radium occurs naturally at about 1.2 pCi/L, how many radioactive nuclei would be present in a 12.5 kL swimming pool? b. c. What then would be its initial activity in Bq? If the 12.5 kL of water was from an ancient ceremonial pool in Egypt for the private use of King Tut, after 3500 years what would...
The half-life of a sample of 1011 atoms that decay by alpha particle emission is 10...
The half-life of a sample of 1011 atoms that decay by alpha particle emission is 10 min?How many alpha particles are emitted in the time interval from 10 min to 100 min? please help me and show work as fast as possible
A sample of 1.63 x 107 nuclei with a decay constant of 1.4 × 10-5 is...
A sample of 1.63 x 107 nuclei with a decay constant of 1.4 × 10-5 is left for two days. A.) How many are left? B.) what was the initial activity in decays/second? 1 decay/second is a becquerel (Bq).
The half life for the decay of carbon-14 is 5.73 x 10 years. Suppose the activity...
The half life for the decay of carbon-14 is 5.73 x 10 years. Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be 19. Bq. The activity in a similar-sized sample of fresh wood is measured to be 20. Bq. Calculate the age of the artifact. Round your answer to 2 significant digits. years X 5 ?
A sample of 7.0×10^9 atoms that decay by alpha emission has a half-life of 70 min....
A sample of 7.0×10^9 atoms that decay by alpha emission has a half-life of 70 min. How many alpha particles are emitted between t=50min and t=200min? Express your answer using two significant figures.
The half-life of a radioactive isotope is 2.5 min. If there are initially 48 Times 10^32 atoms of this isotope, (a) the number of atoms of this isotope remaining after 15 min is: 12 Times 10^32 7.5 Times 10^31 3 Times 10^32 6 Times 10^4 3 Times 10^2 (b) what is the decay constant? (c) What is the initial activity?
Radioactive Decay - Half-life and Activity 1 Radioactive decay - Half-life Time 0 1000 21 31 750 N 1.000.000 500,000 250,000 125,000 62,500 31.250 15.625 7813 3.506 1.953 977 51 6 500 7 BI . 101 250 125 0 tie 21.234.41516171819, 1012 Time in multiples of A radioactive sample's half-life is 30.2 years. 1 year = 365 days, 1 day = 24 hours, 1 hour - 60 minutes, 1 minute = 60 seconds (a) Find its decay constant in year...
Rubidium-87 decays by ß production to strontium-87 with a half life of 4.7 x 1010 years. What is the age of a rock sample that contains 104.9 ug 7Rb and 4.3 ug 87Sr? years old Assume that no 87Sr was present when the rock was formed. The atomic masses are given in the table below: Nuclide Atomic Mass 87Rb 86.90919 87Sr 86.90888
CHEMWORK Rubidium-87 decays by B production to strontium-87 with a half life of 4.7 x 1010 years. What is the age of a rock sample that contains 109.8 ug 87Rb and 4.8 ug 87 1Sr? years old Assume that no 875r was present when the rock was formed. The atomic masses are given in the table below: Nuclide Atomic Mass 87Rb 86.90919 8781 86.90888 Submit Show Hints
11. Radiometric dating a. If 226Ra has a half-life of 1600 years, what is its decay constant in units of s1? Knowing that radium occurs naturally at about 1.2 pCi/L, how many radioactive nuclei would be present in a 12.5 kL swimming pool? b. c. What then would be its initial activity in Bq? If the 12.5 kL of water was from an ancient ceremonial pool in Egypt for the private use of King Tut, after 3500 years what would...
The half life for the decay of carbon-14 is 5.73 x 10 years. Suppose the activity due to the radioactive decay of the carbon-14 in a tiny sample of an artifact made of wood from an archeological dig is measured to be 19. Bq. The activity in a similar-sized sample of fresh wood is measured to be 20. Bq. Calculate the age of the artifact. Round your answer to 2 significant digits. years X 5 ?
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