calculus

posted by .

The half-life of Radium-223 is 11.43 days. If a sample has a mass
of 900 mg, find the mass (in mg) that remains after
5 days

  • calculus -

    78.7mg

  • calculus -

    hue

  • Chemistry -

    393.7mg

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Calculus

    The half-life of Palladium-100 is 4 days. After 12 days a sample of Palladium-100 has been reduced to a mass of 4 mg. What was the initial mass (in mg) of the sample?
  2. chemistry

    the half-life of radon-222 is 3.823 days. what was the original mass if 0.050g remains after 7.646 days?
  3. Chemistry

    Radium-223 has a half-life of 11.4 days.Approximately how long would it take for the activity of a sample of Radium-223 to decrease to 1.00% of its initial value?
  4. Chemistry

    a) 45.02% of the sample remains after 85 days. Consider how you can use the percent of Ir-192 remaining and the number of days to calculate the mass remaining after 85 days.
  5. calculus

    The half-life of Radium-223 is 11.43 days. If a sample has a mass of 400 mg, find the mass (in mg) that remains after 6 days
  6. physics

    The half-life of Th(227) is 18.72 days. It decays by alfa emission to Ra(223), an alfa emitter whose half-life is 11.43 days. A particular sample contains 10^6 [10E(+6)] atoms of Th(227) and no Ra(223) at time t=0. a) How many atoms …
  7. chemistry

    isotope chromium -51 has a half life of 28 days. If the original sample had a mass of 28.0 grams, what mass of chromium -51 sample remains after 84 days?
  8. Science

    The half-life of randon-222 is 8 days. What was the original mass if 6 grams remains after 24 days?
  9. Chemistry

    Radium-223 has a half-life of 11.4 days. Approximately how long would it take for the activity of a sample of 223Ra to decrease to 2.00 % of its initial value?
  10. Chemistry

    Radium-223 has a half-life of 11.4 days.Approximately how long would it take for the activity of a sample of 223Ra to decrease to 2.00 % of its initial value?

More Similar Questions