Question

An unknown radioactive substance has a half-life of 3.20 hours . If 38.3 g of the...

An unknown radioactive substance has a half-life of 3.20 hours . If 38.3 g of the substance is currently present, what mass A0 was present 8.00 hours ago?

Science   Chemistry   
0 0
Add a commentTranscribed image text
Next >

Homework Answers

Answer #1


0 0
Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Log In

Sign Up

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
You are using a Geiger counter to measure the activity of a radioactive substance over the...
You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the reading of 400. counts has diminished to 100. counts after 54.3 minutes , what is the half-life of this substance? Express your answer with the appropriate units. t1/2 = 27.2 min Correct Part B An unknown radioactive substance has a half-life of 3.20 hours . If 20.6 g of the substance is currently present, what mass A0 was...
Part A You are using a Geiger counter to measure the activity of a radioactive substance...
Part A You are using a Geiger counter to measure the activity of a radioactive substance over the course of several minutes. If the reading of 400. counts has diminished to 100. counts after 78.4 minutes , what is the half-life of this substance? Express your answer with the appropriate units. Part B An unknown radioactive substance has a half-life of 3.20 hours . If 26.8 g of the substance is currently present, what mass A0 was present 8.00 hours...
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. If a sample has...
The radioactive isotope thorium 234 has a half-life of approximately 578 hours. If a sample has an initial mass of 64 mg, a function that models the mass in mg after t hours is a(t) =   The initial mass will decay to 12 mg after ______ hours Radioactive decay equation: a(t) = a0⋅2 ^ (−t / h) a0 = starting amount a(t) = amount after t hours h = half life in hours
32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 89.5...
32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 89.5 g of 32P, how much 32P was present 8.00 days ago?
Initially 100 milligrams of a radioactive substance was present. After 5 hours the mass had decreased...
Initially 100 milligrams of a radioactive substance was present. After 5 hours the mass had decreased by 7%. If the rate of decay is proportional to the amount of substance present at time t, determine the half-life of the radioactive substance
Initially 100 milligrams of a radioactive substance was present. After 8 hours the mass had decreased...
Initially 100 milligrams of a radioactive substance was present. After 8 hours the mass had decreased by 4%. If the rate of decay is proportional to the amount of the substance present at time t, determine the half-life of the radioactive substance. (Round your answer to one decimal place.)
A 320.3ng sample of an unknown radioactive substance was placed in storage and its mass measured...
A 320.3ng sample of an unknown radioactive substance was placed in storage and its mass measured periodically. After 47 days the amount of radioactive substance decreased to 40.04ng. How many Half lives of the unknown radioactive substance have occurred?
32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 75.7...
32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 75.7 g of 32P, how much 32P was present 6.00 days ago?
32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 86.3...
32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 86.3 g of 32P, how much 32P was present 3.00 days ago?
32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 62.9...
32P is a radioactive isotope with a half-life of 14.3 days. If you currently have 62.9 g of 32P, how much 32P was present 6.00 days ago?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT