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Harrizon [31]
3 years ago
13

the radioisotope radon-222 has a half-life of 3.8 days. how much of a 65-g sample of radon-222 would be left after approximately

15 days?
Chemistry
1 answer:
MariettaO [177]3 years ago
7 0
Use the 1st order decay equation 
<span><span>Cfinal</span>=<span>Cinitial</span><span>e<span>−kt</span></span></span> 
by filling in and doing the math you will get:

<span> </span><span>Cfinal</span><span> = 1.11 grams Rn-222 after 23 days. 
 
hope this helps 

</span>
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<h3>Definition of molarity</h3>

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