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jayrsauce
17.07.2019 •
Mathematics
Suppose a laboratory has a 38 g sample of polonium-210. the half-life of polonium-210 is about 138 days. how many half-lives of polonium-210 occur in 1104 days? how much polonium is in the sample 1104 days later? 9 ; 0.07 g 8 ; 2,2622 g 8 ; 4.75 g 8 ; 0.15 g
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Ответ:
1104 / 138 = 8
There are 8 half lives.
To find the total amount left multiply the starting amount by 1/2 to the 8th power:
38 * 0.5^8 = 0.148 = 0.15 grams
The answer is the last one.
Ответ:
D. 8; 0.15 g
Step-by-step explanation:
We have been given that a a laboratory has a 38 g sample of polonium-210. The half-life of polonium-210 is about 138 days.
To find the half-lives of polonium-210, we will divide 1104 by 138.
Therefore, there are 8 half-lives will occur in 1104 days.
Therefore, 0.15 gm of the polonium will be left after 1104 days.
Ответ:
Um khan academy can help with this
Step-by-step explanation: