If the half-life of a given substance is 60 days, how long will it take for a 30-gram sample of the substance to decay until the

Question

Ghella [55]

3 years ago

9

If the half-life of a given substance is 60 days, how long will it take for a 30-gram sample of the substance to decay until the

re are only 7.5 grams of the radioactive material remaining?

Chemistry

1 answer:

raketka [301] · Answer 1 · 2022-03-04T15:16:01+03:00

Answer is: 120 days <span>will it take for decay.

</span>Half-life <span>is the time required for a quantity (in this example number of radioactive nuclei of lincolnium) to reduce to half its initial value.
</span>Initial mass of sample: 30 grams.
After first half-life (60 days): 50% · 30 g ÷ 100% = 15 g.
After second half-life (120 days): 0.5 · 15 g = 7.5 g.