SOLUTION: a radioactive substance has a half life of 120 days.if an original sample of the substance has a mass of 10 grams, about how much of the substance will remain after 180 days of the
Algebra.Com
Question 452384: a radioactive substance has a half life of 120 days.if an original sample of the substance has a mass of 10 grams, about how much of the substance will remain after 180 days of the original substance
-------------------------------------------------------------------------------i need help with this question. would appreciate the help. sorry, i dont know if this is under the right section.
Answer by ankor@dixie-net.com(22740) (Show Source): You can put this solution on YOUR website!
a radioactive substance has a half life of 120 days.
if an original sample of the substance has a mass of 10 grams, about how much
of the substance will remain after 180 days of the original substance
:
The radioactive decay formula
A = Ao*2^(-t/h)
where
A = resulting amt after t time
Ao = initial amt
t = time
h = half-life of substance
:
A = 10*2^(-180/120)
A = 10*2^(-3/2)
:
Find 2^-1.5 on calc
A = 10 * .35355
A = 3.5355 grams after 180 days
RELATED QUESTIONS
A radioactive substance has a half-life of 3.5 days. A scientist starts with 80 grams of... (answered by stanbon)
A radioactive substance has a half-life of 26 months. If ater 10 months 42 grams remain, (answered by Fombitz)
A radioactive substance has a half-life of 26 months. If after 10 months 42 grams... (answered by ankor@dixie-net.com)
A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the... (answered by Boreal)
A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the... (answered by ankor@dixie-net.com,greenestamps)
A scientist begins with 250 grams of a radioactive substance. After 250 minutes, the... (answered by greenestamps)
If a radioactive substance has a half-life of 10 days, in how many days will 1/8 of the... (answered by Alan3354)
A radioactive substance has a half-life of 60 years. There is an accident that exposes a... (answered by ankor@dixie-net.com)
A radioactive substance has a half-life of 6.8 hours. If 12.6 kg. remain from the... (answered by ankor@dixie-net.com,CharlesG2)