chem

posted by .

I am not sure if there is an equation for this problem or wut??

A 73-kg person is accidentally exposed for 215 s to a 16-mCi source of beta radiation coming from a sample of 14C.

What is the activity of the radiation source in disintegrations per second? In becquerels? (1 Ci = 3.70 1010 disintegrations/s.)

1)disintegrations/s
2)Bq

thanks for the help!!

  • chem -

    1 Ci = 3.70E10 dps; therefore,
    1 mCi = 1/1000 of that = 3.70E7 dps and that is 3.70E7 Bq

  • chem -

    it said that answers were wrong im pretty sure i have to use the 73 kg and 215 seconds.. or why would they put that in the question?

  • chem -

    The problem asks for activity of the radiation SOURCE, not how much radiation the person was exposed to. Perhaps I've misinterpreted the question. We are never obligated to use all of the numbers in a question.

  • chem -

    do you know how to do it using the numbers. I know for some problems uneeded information can be added but usually if its more than 2 peices then you use at least one of them

  • chem -

    You have to multiply the 3.7e10 by the 16mCi, and then divide by 1000. Disintegrations/s, and bq will be the same. Remember sig figs....

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Math

    wut iz, 10+10+4=4x x=? do what the equation tells you 1)add 10+10+4 2)since in the other side of the eqaution you have 4x, in order to leave the X alone you must divide by 4 on both sides and you will get______ that is the value of
  2. Chemistry

    A certain Geiger counter is known to respond to only 1 of every 1000 radiation events from a sample. Calculate the activity of each radioactive source in curies, given the following data. My text barely attempts to explain how to do …
  3. chem

    A 73-kg person is accidentally exposed for 215 s to a 16-mCi source of beta radiation coming from a sample of 14C. What is the activity of the radiation source in disintegrations per second?
  4. chem

    Each beta particle has an energy of 2.51 10-14 J, and 7.5% of the radiation is absorbed by the person. Assuming that the absorbed radiation is spread over the person's entire body, calculate the absorbed dose in rads and in grays i …
  5. Chem

    The age of a bone was to be determined by 14C dating. 14C has a half-life of 5,730 years, and a Geiger counter shows that the 14C in living tissue gives 15.2 cpm g-1 of carbon. If the same Geiger counter shows that the 14C in a sample …
  6. chem

    A typical dose of a radioactive sample is 27.0 mCi. How long does it take for the activity to reduce to 0.100 mCi?
  7. physical science

    Which of the following statements is NOT true?
  8. Math

    For questions 1 and 2 choose the equation or proportion that you can use to solve the problem: What number is 73% of 215?
  9. math

    for questions 1 and 2 chose the equation or proportion that you can use to solve the problem what number is 73% of 215 A( 215=0.73n B( n=0.73 X 215 C( 0.73=n X 215 D( 215=73n what percent of 94 is 23 A( n/94=23/100 B( 23/94=n/100 C( …
  10. PHYSICS

    During an X-ray examination, a person is exposed to radiation at a rate of 3.17×10-5 grays per second. The exposure time is 0.170 s, and the mass of the exposed tissue is 1.24 kg. Determine the energy absorbed.

More Similar Questions