All radio active reactions follow first order kinetics.
Given that each half life of reaction = 12.4 months
Then,
Monts for five half lifes = 5 * 12.4 = 62 months.
(b) 62 months
If the half life of a given radioactive nucleus is 12.4 months, how many months would...
If the half-life of a radioactive isotope is 32 days, how many half-lives must pass before a 3000mg sample is less than 0.03g? 05 O 2 07 More information is needed. 9
V Question 5 3.03 pts Suppose a radioactive isotope has a half-life t% = 99.1 hr. How long will it take for a sample of the isotope to decay to 3.0% of its original activity? a. 218 hr b. 0.0354hr c. 348 yr d. 297 hr e. 501 hr O a Ob Ос Question 6 3.03 pts A radioactive isotope has a half-life, t% = 27.3 yr How long will it take for a 3.27 mCi sample of this isotope...
The half-life of a radioactive isotope is 220 d. How many days would it take for the decay rate of a sample of this isotope to fall to 0.47 of its initial rate?
Questions 3.03 Suppose a radioactive isotope has half-life-99.11. How long will take for a sample of the Isotope to decay to 3.0% of its originaltivity? a 2181 b. 0.0354h C348 yr d. 297 h e. 501 he Oь Od Od O. Question 303 A radioactive stope has halte-273 How long will be for 3.27 mmple of the Isotope to decay to 0.351 CIT 00817 y 382 y 133 y d. 87.9 y 6.60.9 y O. Оe Question 7 3.03 pts...
A 175 ng sample of radioactive material has a half life of 8.8 days. How many ng of radioactive material is left after 3 half lives? Do not put units in your answer
If a container of radioactive isotope has a half-life of 10 years, how many years will it take for there to only be 25% of the isotope remaining in the container.
a
radioactive material has a half life of 7 days. how many
radioactive isotopes are left after 33 hours, if you had 7000000
isotopes in the beginning?
Question 33 1 pts A radioactive material has a half life of 7 days. How many radioactive isotopes are left after 33 hours, if you had 7 000 000 isotopes in the beginning? Use 2 sig figs in your answer. < Previous Next >
how many half lives does it take for a radioactive isotope to reach 1/5 its initial number?
The half-life for radioactive decay (a first-order process) of plutonium-239 is 24,000 years. How many years would it take for one mole of this radioactive material to decay so that just one atom remains? Express your answer using two significant figures.
2. What are the units of half life? How many half lives have expired when a radioactive object decays to 12.5% of its original radioactivity?