The half-life of nitrogen-13 is approximately 9.97 minutes. How much of a 3 gram sample of...
The half-life of nitrogen-13 is approximately 9.97 minutes. How much of a 3 gram sample of nitrogen-13 would remain after 8 minutes? Round to three decimal places
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The half-life of nitrogen-13 is approximately 9.97
minutes. How much of a 3 gram sample of...
The half-life of cesium-137 is 30 years. Suppose we have a 18-gram sample. (a) Find the...
The half-life of cesium-137 is 30 years. Suppose we have a 18-gram sample. (a) Find the yearly growth factor a. (Round your answer to five decimal places.) a = (b) Find an exponential model m(t) = Cat for the mass remaining after t years. m(t) = (c) How much of the sample will remain after 85 years? (Round your answer to two decimal places.) g (d) After how long will only 3 g of the sample remain? (Round your answer...
The decay of antimony-131 is first order with a half life is 23.03 minutes. How much...
The decay of antimony-131 is first order with a half life is 23.03 minutes. How much of 1.4228 g sample would remain after 1.368 hours?
The half-life of an element is 45 minutes. How much of a 7.0 mg sample is...
The half-life of an element is 45 minutes. How much of a 7.0 mg sample is still active after 3 hours 0.88 mg 0.50 mg 1.0 mg 3.5 mg
Phosphorus-32 has a half-life of 14.3 days. How many grams remain from a 10 gram sample...
Phosphorus-32 has a half-life of 14.3 days. How many grams remain from a 10 gram sample after 13 days? Click here for a copy of Final Exam cover sheet.
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. (a) If a sample...
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. (a) If a sample has a mass of 67 milligrams, find an expression for the mass after t hours. Q(t) = 67e-0.0011997 (b) How much will remain after 85 hours? (Round your answer to one decimal place.) 60.5 mg (c) When will the initial mass decay to 20 milligrams? (Round your answer to one decimal place.) 1008.3 x hr
The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after...
The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after 71.1 hours? 1.25 g 5.00 g 2.50 g Not enough information is given.
The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after...
The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after 71.1 hours? O 1.25 g O 5.00 g 0 2.50 g O Not enough information is given.
Consider a 15.60g sample of 131I, which has a half-life of 8.02 days. a. How much...
Consider a 15.60g sample of 131I, which has a half-life of 8.02 days. a. How much of the sample (in grams) will remain after 16.04 days? b. How much of the sample will remain after 16.04 hours?
4. A newly discovered isotope was found to have a half life of 30 minutes. How...
4. A newly discovered isotope was found to have a half life of 30 minutes. How much of 100g of the isotope would remain after 2 hours?
Nitrogen 13 has 7 protons and a half life of 600 seconds. What is the activity...
Nitrogen 13 has 7 protons and a half life of 600 seconds. What is the activity in Ci after 88.367 minutes? The initial mass of the nitrogen 13 is 93.633 micrograms. The mass of N13 is 13.005799 g/mole.
The half-life of an element is 45 minutes. How much of a 7.0 mg sample is still active after 3 hours 0.88 mg 0.50 mg 1.0 mg 3.5 mg
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. (a) If a sample has a mass of 67 milligrams, find an expression for the mass after t hours. Q(t) = 67e-0.0011997 (b) How much will remain after 85 hours? (Round your answer to one decimal place.) 60.5 mg (c) When will the initial mass decay to 20 milligrams? (Round your answer to one decimal place.) 1008.3 x hr
The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after 71.1 hours? 1.25 g 5.00 g 2.50 g Not enough information is given.
The half-life of tungsten-187 is 0.9875 days. How much of a 10.0 gram sample remains after 71.1 hours? O 1.25 g O 5.00 g 0 2.50 g O Not enough information is given.
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