Asked by brianna

the quetion says "f the half life of Americium-241 is 433 years, &your sample size is 80 grams, how much will remain after 1,732 years?" i don't quite understand how to solve this problem... PLEAS HELP. SOS (gotta test 2morrow, and don't really know how to do these problems THANKS!!
Answered by drwls
1732 years is exactly 4 half-lives. The amount of Americium-241 will have decreased by half four times. The amount remaining will be (1/2)^4 = 1/16 of the original amount

1/16 of 80 is __?
Answered by brianna
sorry it took so long for me to reply back, i was giving up hope, and was about to shutdown my computer
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