Chemistry

half life of tritium is 12.5 years. how much will remain after 100 years if you started wit 256 grams?

  1. 👍 0
  2. 👎 0
  3. 👁 195
  1. First determine k.
    k = 0.593/t1/2, then substitute the value of k into the equation below.

    ln(256/N) = k(100)
    Solve for N in grams.

    1. 👍 0
    2. 👎 0
  2. Thanks so much!

    1. 👍 0
    2. 👎 0
  3. I made two typos. k = 0.693/t1/2

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Chemistry

    Which radioactive sample would contain the greatest remaining mass of the radioactive isotope after 10 years? A. 2.0 grams of 198 Au B. 2.0 grams of 42 K C. 4.0 grams of 32 P D. 4.0 grams of 60 Co By the way the numbers next to

    asked by Sanjay on March 3, 2007
  2. math

    Complete the table for the radioactive isotope. (Round your answer to two decimal places.) Isotope: 239Pu Half-life (years): 24,100 Initial Quantity: g Amount After 1000 Years: 0.6

    asked by madison on June 1, 2018
  3. chemstry

    How long will it take 200 mg of carbon-14 to decay to the point where only 75 mg remain if the half-life is 5770 years?

    asked by jordan on October 31, 2013
  4. help

    Tritium (H-3) has a half-life of 12.3 years. How old is a bottle of olive oil if the tritium content is 25% that of a new sample of olive oil? Show all calculations leading to a solution.

    asked by Ciaria on March 11, 2015
  5. Pre-Calc

    Tritium, a radioactive isotope of hydrogen, has a half-life of 12.4 years. Of an initial sample of 69 grams, how much will remain after 75 years?

    asked by Anonymous on May 12, 2016
  1. math

    An element has a half-life of 30 years. If 1.0 mg of this element decays over a period of 90 years, how many mg of this element would remain? Begin amount is 1.0 elapsed time is 90y half life 30 years n=9/30 n=3 90/2^2 90/8 =

    asked by Lynette on March 24, 2017
  2. Calculus

    The half-life of Radium-226 is 1590 years. If a sample contains 100 mg, how many mg will remain after 4000 years?

    asked by Anonymous on November 16, 2012
  3. chemistry

    a)indium-115 has a half life of 4.5 hours. if you start with a 12.0-mg sample of indium-115, how much will remain after 13.5 hours? b)how much of a 3.50-mg smaple of nickel-63 will remain after 368 years? the half-life of

    asked by amanda on October 31, 2008
  4. Chemistry

    A pure sample of tritium, 3H, was prepared and sealed in a container for a number of years. Tritium undergoes รข decay with a half-life of 12.32 years. How long has the container been sealed if analysis of the contents shows there

    asked by Queen on December 7, 2010
  5. math

    Suppose strontium-90 decays at a rate of 2 percent per year. (a) Write the fraction P of strontium remaining, as function of t, measured in years. (Assume that at time t=0 there is 100 % remaining.) Answer: P(t)=(.98)^t (b)

    asked by mac on September 14, 2017

You can view more similar questions or ask a new question.