Monday

March 30, 2015

March 30, 2015

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

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

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.

**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 ...

chemistry 1405 - how to write a nuclear equation for the nuclear decay of Ra-226...

Chemistry - The half-life of radon-222 is 3.82 days. If a sample of gas contains...

chemistry - Radon-222 undergoes alpha decay.what is the nuclear equation

Chemistry - Recently, there has been much concern about pollution in the home ...

Physical Science - 1. Which equation correctly shows beta decay? (A) 210/82 Pb...

Science - Radium has a half-life of 1620 years and decays into radon, which has...

Chemistry - A 1.50- gas sample at 722 and 25.0 contains 7.56 radon-220 by volume...

Chemistry - A 1.50- gas sample at 735 and 25.0 contains 5.00 radon-220 by volume...