Half-Lifes

posted by .

How much of a 6gram sample of silver-105m would remain after 4 minutes?
Half life=7.2 minutes

  • Half-Lifes -

    k = 0.693/t1/2
    Substitute k into the equation below.
    ln(No/N) = kt.
    No = 6
    N = unknown
    k = from above
    t = 7.2 min
    I get approximately 4 g remaining.

  • Half-Lifes -

    Great! But, so that I can understand it in the future, can you tell me what the value of k is a little more clearly? how do you do a subscript of 1/2?

  • Half-Lifes -

    The half life is given in the problem (last line you typed) of 7.2 minutes.
    I write a t1/2
    To turn on subscript type < followed by sub followed by >. Then type the 1/2. To turn subscript off type < followed by /sub followed by >

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Chemistry

    Which radioactive sample would contain the greatest remaining mass of the radioactive isotope after 10 years?
  2. chemistry

    If there are 80 milligrams of a radioactive element decays to 10 milligrams in 30 minutes then what is the elements half life in minutes?
  3. chemistry

    the half-life of polonium-218 is 3.0 minutes. what percentage of the original sample remains after 4 half-lives?
  4. Chemistry

    The most abundant isotope of the element nobellum has a half-life of 58 minutes. After 174 minutes the sample has a mass of .300 mg. What was the orignal mass of the sample?
  5. chemistry

    use the nuclear decay equation to find out how much a 7mg sample of iodine 128 remains after 116 minutes if the half life of this isotope is 25 minutes.
  6. Biology

    The half -life of carbon-14 is 5,730 years.how much of an initial amount of this substance would remain after 17,190 years(3 Half-lifes
  7. Half-Life

    Uranium-238 decays to Lead-206. The half life of Uranium-238 is 4.5 billion years. If you have a 100 g sample. How much sample will you have after 2 half lifes?
  8. science

    If the half-life of a 20.0g is known to be 24 minutes, how long will it take for only 5.0 grams of the sample to remain A.6 minutes B.24 minutes C.48 minutes D.96 minutes I NEED HELP!!!!
  9. Chemistry

    Barium-122 has a half-life of 2 minutes. If 10.0 g of Ba-122 are produced in a nuclear reactor how much Ba-122 will remain 10 minutes after production ceases?
  10. Chemistry

    How much of a 50.0 grams sample of Uranium-238 would remain after 26 minutes IF the half-live is 13.0 minutes?

More Similar Questions