Question

if we start with 1.000g of stronium-90, 0.953g will remain after 2.0 years. a.) what is...

if we start with 1.000g of stronium-90, 0.953g will remain after 2.0 years.

a.) what is the half life of stronium-90?

b.) how much stronium-90 will remain after 5.00 years?

TYPE ALL ANSWERS NO HANDWRITTEN PLEASE

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
What fraction of a sample of 6832Ge, whose half-life is about 9 months, will remain after...
What fraction of a sample of 6832Ge, whose half-life is about 9 months, will remain after 2.3 years?
The half-life of a dangerous radionuclide, strontium-90, 90Sr, is 29 years. This isotope is produced during...
The half-life of a dangerous radionuclide, strontium-90, 90Sr, is 29 years. This isotope is produced during the nuclear fission reactions of atomic power reactors; if a receptor is compromised (at Chernobyl and Fukushima it happened) considerable amounts can be released. It has yet to be disclosed how much 90Sr was released at Fukushima (the authorities won't say, though perhaps they don't know), so let's just suppose 9.0 g (possibly a gross underestimate). a. Please find the rate constant for the...
If you start with 4.5×10−2 M I2 at this temperature, how much will remain after 2.56...
If you start with 4.5×10−2 M I2 at this temperature, how much will remain after 2.56 s assuming that the iodine atoms do not recombine to form I2?
The half-life of Sr 90 is 28 years A. how many grams of Sr 90 in...
The half-life of Sr 90 is 28 years A. how many grams of Sr 90 in a 8.00 g sample of this nuclide will have decayed after 84 years? B. how many hours are required to reduce the amount of Sr 90 present in 80.0g sample to 10.0mg?
The half-life of cesium-137 is 30 years. Suppose we have a 13-g sample. (a) Find a...
The half-life of cesium-137 is 30 years. Suppose we have a 13-g sample. (a) Find a function m(t) = m02−t/h that models the mass remaining after t years. m(t) = ____ (b) Find a function m(t) = m0e-rt that models the mass remaining after t years. (Round your r value to four decimal places.) m(t) = _____ (c) How much of the sample will remain after 71 years? (Round your answer to one decimal place.) ____ g (d) After how...
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?
The first-order rate constant for the decomposition of N2O5, 2N2O5(g)?4NO2(g)+O2(g), at 70?C is 6.82×10?3s?1. Suppose we...
The first-order rate constant for the decomposition of N2O5, 2N2O5(g)?4NO2(g)+O2(g), at 70?C is 6.82×10?3s?1. Suppose we start with 2.90×10?2 mol of N2O5(g) in a volume of 1.5 L . a) How many moles of N2O5 will remain after 5.0 min ? b) How many minutes will it take for the quantity of N2O5 to drop to 2.0×10?2 mol? c) What is the half-life of N2O5 at 70?C?
The half-life of the radioactive material cesium-137 is 30 years. Suppose we have a 180-mg sample....
The half-life of the radioactive material cesium-137 is 30 years. Suppose we have a 180-mg sample. (a) Write a formula that gives the mass that remains after t years. (Round the relative growth rate to four decimal places.) A(t) =   (b) How much of the sample remains after 100 years? (Round your answer to two decimal places.) mg (c) After how long will only 1 mg remain? (Round your answer to one decimal place.) years (d) At what rate is...
The half-life of a radioactive isotope represents the average time it would take half of a...
The half-life of a radioactive isotope represents the average time it would take half of a collection of this type of nucleus to decay. For example, you start with a sample of 1000 Oxygen-15 (15O) nuclei, which has a half-life of 122 seconds. After 122 seconds, half of the 15O nuclei will have decayed into Nitrogen-15 (15N) nuclei. After another 122s, half of the remaining Oxygen nuclei will have also decayed, and so on. Suppose you start with 4.00×103 15O...
The half-life of radioactive strontium-90 is 29 years. In 1960, radioactive strontium-90 was released into the...
The half-life of radioactive strontium-90 is 29 years. In 1960, radioactive strontium-90 was released into the atmosphere during testing of nuclear weapons, and was absorbed into people's bones. a. Write down a function describing the amount of strontium-90 left in a person's bones, t years after the 1960 nuclear test. b. In what year will only 10% of the original amount absorbed by a person remains?
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT