chemistry

posted by .

how much cobalt-60 remains 15 years after it is initially made?cobalt-60 has half life 5.27

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. chemistry

    the mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10.5 years. from this info calculate the half-life of cobalt-60
  2. chemistry

    the mass of cobalt-60 in a sample is found to have decreased from 0.800g to 0.200g in a period of 10.5 years. from this info calculate the half-life of cobalt-60
  3. chem

    Cobalt-60 is a strong gamma emitter that has a half-life of 5.26 yr. The cobalt-60 in a radiotherapy unit must be replaced when its radioactivity falls to 75% of the original sample. If an original sample was purchased in October 2005, …
  4. Chemistry

    A student reacted 5.33 grams of cobalt with oxygen gas and obtained 7.50 grams of cobalt oxide. Determine the empirical formula of this cobalt-oxygen compound based upon this experiment.
  5. Chemistry

    the half-life of cobalt-60 is 5.20 years.. how many milligrams of a 2.000-mg sample remains after 6.55 years
  6. physical science

    cobalt-60 has a half-life of 5.26 years, how much of a 500 gram sample will be left after 21 years
  7. physics

    A thermal neutron beam of intensity 1 to the power 11, neutrons/sec is directed for 2 days into a cavity in a block of cobalt initially composed entirely of the stable isotope Cobalt 59. The neutrons are all captured, producing cobalt …
  8. chemistry

    A student determines the cobalt(II) content of a solution by first precipitating it as cobalt(II) hydroxide, and then decomposing the hydroxide to cobalt(II) oxide by heating. How many grams of cobalt(II) oxide should the student obtain …
  9. matg

    Cobalt-60 has a half-life of about 5 years. How many grams of a 300 g sample will remain after 20 years?
  10. science

    Cobalt-60 has a 30 year half-life. How much of an 80 gram sample would remain after 60 years?

More Similar Questions