Question

Situation:
You have 100ml of isotopically labelled water 3H2o. That is, the water is made with the radioactive isotope of hydrogen, tritium, 3H. Compounds that contain radioactive isotopes are called "hot." You pour this 100 mL of "hot" water into the ocean and allow it to thoroughly mix.
Question:
After the "hot" water mixes thoroughly with the ocean water, you remove 100mL of ocean water. How many molecules of 3H2o do you expect there to be in this 100mL sample. (Ignore any radioactive decay of the tritium)

Answer 1

Does anyone know or have any idea how I should go about solving that question??

Answer 2

its 21, Duh.