Mathematics: Iodine-131 has a half-life of 8 days. How much would be left of an original 40 g sample after 40 days? a) 32gb) 8gc) 131gd) 1.25ge) 0.8g

Iodine-131 has a half-life of 8 days. How much would

Ответ:

branj1317

09.03.2021

d) 1.25 g

Step-by-step explanation:

If it has a half life of 40 days, there will be 5 half-lives in that span of time so if you divide 40 by 2, 5 times or just $\frac{40}{2^{5} }$ , it will equal 1.25.

$\frac{40}{2}=20\\$

$\frac{20}{2} =10$

$\frac{10}{2} =5$

$\frac{5}{2} =2.5\\$

$\frac{2.5}{2} =1.25$

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Ответ:

arianapowell56

20.02.2023

Mathematics

53:24

Step-by-step explanation:

I think if wrong so sorry

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Iodine-131 has a half-life of 8 days. How much would be left of an original 40 g sample after 40 days? a) 32g
b) 8g
c) 131g
d) 1.25g
e) 0.8g

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Iodine-131 has a half-life of 8 days. How much would be left of an original 40 g sample after 40 days? a) 32gb) 8gc) 131gd) 1.25ge) 0.8g​

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Iodine-131 has a half-life of 8 days. How much would be left of an original 40 g sample after 40 days? a) 32g
b) 8g
c) 131g
d) 1.25g
e) 0.8g