Homework Help: nuclear chem

Posted by kenny on Sunday, August 5, 2007 at 9:01pm.

i need help solving this. Can you guys show me how it's done.

Radium-226 decays by alpha emission to radon-222, a noble gas.What volume of pure Radon- 222 at 23oC and 785mmHg could be obtained from 543.0 mg of radium bromide,RaBr2 in a period of 20.2 years.The half-life of radium-226 is 1602 years.

k = 0.693/t_1/2
plug in the half life of Ra-226 and calculate k. THEN, convert 543.0 mg RaBr2 to mg Ra. I will call that value No. Use No in the following formula to calculate N (t is the time of 20.2 years.)
ln(No/N) = kt

From N, which is mg Ra remaining, calculate how much has decayed, convert the amount decayed into mass of Rn-222 and use PV = nRT to calculate the volume Rn at the conditions specified. Check my thinking.

No one has answered this question yet.

Answer this Question

Related Questions

S103 - Which element results if 2 protons and 2 neutrons are ejected from a ...
nuclear physics - An atom of Radium-228 transmutes to radon-222. Write the ...
CHEM - the nuclide 232 Th 90 is radioactive. when one of the atoms decays, a ...
Physics - Marie Curie first identified the element radium in 1898. She found ...
Science - Radium has a half-life of 1620 years and decays into radon, which has...
Nuclear Chem - the nuclide 232 Th 90 is radioactive. when one of the atoms ...
chemistry - Radon-222 undergoes alpha decay.what is the nuclear equation
Chem 3A - please help me with this chemistry problem. Half-Life A radium-226 ...
chemistry - A radium-226 sample initially contains 0.112mol. How much radium-226...
Chemistry - The half-life of radon-222 is 3.82 days. If a sample of gas contains...

For Further Reading

First Name:
School Subject:
Answer: