posted by .

in an initial mass of 40g, how much mass Remaining of the Isotope

Approximately how much mass remains after 8.0 hours? After 21 hours, and what is the half life of the isotope

  • physics -

    What is the isotope? You are being asked for the half life without being provided with any data on the decay rate.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    Gallium-67 is used medically in tumor-seeking agents. The half-life of gallium-67 is 78.2 hours. If you begin with 36.6 mg of this isotope, what mass remains after 190 hours have passed?
  2. chemistry

    A radioactive sample contains 2.45g of an isotope wiht a half life of 3.8 days. How much of the isotope in grams remains after 11.4 days?
  3. math grade 12

    2. An isotope of sodium has a half-life of 15 h. A sample of this isotope has a mass of 2 g. a. [2] Find the mass equation that remains after t hours. b. [1] Find the mass that remains after 5 hours, to the nearest hundredth. c. [2] …
  4. Half-life

    After two hours, 1/16 of the initial amount of a radioactive isotope remains undecayed. What is the half-life of the isotope?
  5. isd muscat

    after two hours 1/16th of the radioactive isotope remains undecayed.half life of the isotope is
  6. Radioactivity

    How are the terms "activity" and "becquerel" related?
  7. Radioactivity or science

    A radioactive isotope source has a mass of 120ug. If the isotope had a half life of 20s, what would be the mass if the isotope after 2 mins?
  8. chem

    The half-life of the Nobelium isotope No^257 is about 23 seconds. 644 seconds (or 28 half-life periods) after the isotope was released there were 20 grams remaining. The number of grans of No^257 after h half life periods is M= 20 …
  9. Calculus

    The amount remaining of a radioactive substance after t hours is given by A(t) = 100ekt. After 12 hours, the initial amount has decreased by 4%. How much remains after 48 hours?
  10. Physics (Inside the atom)

    A sample of radioactive isotope I is to be used for medical diagnosis of the kidneys. The isotope has a half-life of 8.0 days, and the sample is required to have an activity of 8 x 10^5 per second at the time it is given to the patient. …

More Similar Questions