Question

After 45 years, 35 % of a radioactive material decays. What is the half-life?

After 45 years, 35 % of a radioactive material decays. What is the half-life?

Homework Answers

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
A sample of a certain radioactive material decays to 89.36% of its mass after 2 years....
A sample of a certain radioactive material decays to 89.36% of its mass after 2 years. a. What is the half-life of the material? Show your calculations and keep four significant figures of accuracy. b. How long would it take for the sample to decay to 10% of its original mass? How much longer after that would it take to decay to 1% of its original mass?
Q.1 Radioactive 68Ge decays by β+ with a 271 day half-life. How many grams of an...
Q.1 Radioactive 68Ge decays by β+ with a 271 day half-life. How many grams of an initial 2.50 g sample of 68Ge remain after 365 days of radioactive decay? Q.2 A particular reaction has an initial concentration of 4.302 M and a final concentration of 3.978 M after 1.08 seconds. The rate constant is 0.0175 M-1s-1. What is the half-life at the initial concentration?
If 1/8 of a radioactive element remains after 600 years, what is the element half life?...
If 1/8 of a radioactive element remains after 600 years, what is the element half life? Please explain steps?
Hydrogen- 3 is radioactive and has a half life of 12.3 years. What percentage of a...
Hydrogen- 3 is radioactive and has a half life of 12.3 years. What percentage of a sample would be left after 53.3 years? Round your answer to 2 significant digits. Hydrogen- 3 is radioactive and has a half life of 12.3 years. What percentage of a sample would be left after 53.3 years? Round your answer to 2 significant digits.
You have a sample of a radioactive material with a half-life of 5.0 years that has...
You have a sample of a radioactive material with a half-life of 5.0 years that has a current activity of 0.12 µCi. The sample has a label on it which indicates that when it was first manufactured it had an activity of 3.84 µCi. How long ago was the sample manufactured? (to 2 s.f and in years)
A radioactive material produces 1170 decays per minute at one time, and 4.8 h later produces...
A radioactive material produces 1170 decays per minute at one time, and 4.8 h later produces 300 decays per minute. Part A What is its half-life? Express your answer using two significant figures. Part B What is the activity of a sample of 146C that contains 2.8×1020 nuclei?
strontium 90 is a radioactive material that decays according to the function A(t)=Aoe^0.0244t ,where So is...
strontium 90 is a radioactive material that decays according to the function A(t)=Aoe^0.0244t ,where So is the initial amount present and A is the amount present at time t (in year). assume that a scientist has a sample of 800 grams of strontium 90. a)what is the decay rate of strontium 90? b)how much strontium 90 is left after 10 years? c)when Will only 600 grams of strontium 90 be left? d)what is the half life of strontium 90?
Strontium-90 (90Sr) is a radioactive isotope with a half-life of 28.8 years. What percentage of this...
Strontium-90 (90Sr) is a radioactive isotope with a half-life of 28.8 years. What percentage of this isotope remains after 11.4 years?
An unknown radioactive element decays into non-radioactive substances. In 520 days the radioactivity of a sample...
An unknown radioactive element decays into non-radioactive substances. In 520 days the radioactivity of a sample decreases by 35 percent. (a) What is the half-life of the element? (days) (b) How long will it take for a sample of 100 mg to decay to 44 mg? time needed: (days)
The radioactive isotope 32P decays by first-order kinetics and has a half-life = 14.3 days. How...
The radioactive isotope 32P decays by first-order kinetics and has a half-life = 14.3 days. How many atoms of a 1.0000 ug sample of 32P would decay in 1.0000 second? (Assume 1 decay per atom.)
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT