Chemistry
Chemistry, 19.08.2019 20:30, rickyop8010

What is the half-life of an isotope if after 2.00 weeks you have 31.25 g remaining from a 250.0 g starting sample size

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Physics, 26.06.2019 14:00, christyr2002
Jai was measuring the radioactivity of different radioactive isotopes. isotope a had a starting radioactive level of 50 g, and after 4 days it measured at 30 g. isotope b had a starting radioactive level of 75 g, and after 4 days it measured at 25 g. which best explains the isotopes? isotope a has a shorter half-life than isotope b., isotope a has a longer half-life than isotope b., isotope a has half the half-life of isotope b., or isotope a has twice the half-life of isotope b.
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Chemistry, 28.06.2019 20:30, littlemrslazy
What is the half life isotope if after 21 days you have 31.25 g remaining from a 250.0 g starting sample size?
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Mathematics, 19.07.2019 22:30, lazok
The amount of a sample remaining after t days is given by the equation mc001-1.jpg, where a is the initial amount of the sample and h is the half-life, in days, of the substance. a scientist has a 10-mg sample of a radioactive isotope. the isotope has a half-life of 8 days. after 16 days, how much of the radioactive isotope remains? 2.0 mg 2.5 mg 5.7 mg 7.1 mg
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Chemistry, 24.08.2019 01:30, svarner2001
The half-life of a radioactive isotope is 20.0 minutes. what is the total amount of a 1.00-gram sample of this sample of this isotope remaining after 1.00 hour?
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