Question

Please help ill medal and fan!

After 15 minutes, 30 g of a sample of polonium-218 remain uncharged. If the original sample had a mass of 960 g, what is the half-life of polonium-218?

And

Suppose you want to separate the leaves, acorns, and twigs from a pile of soil. Filtration and distillation are two processes of separating mixtures. Explain which process you would use and why.

Answer 1

Three minutes for the first one... let me see with this next one...

Answer 2

ok i found EXACLY what they are looking for as an answer so dont copy this word for word just saying:

Filtration would be used because it is the process of separating mixtures based on the size of their particles
(or pieces). A screen could be used to separate the mixture. The holes in the screen would need to be large
enough to allow the soil to pass through but not the leaves, acorn, or twigs.

Answer 3

need anymore help?

Answer 4

Initial sample 960g

after 1 half life 480g

after 2 half-lives 240g

after 3 half-lives 120g

after 4 half-lives 60g

after 5 half-lives 30g

The sample went through 5 half-life cycles in 15 minutes, so 1 half-life is 3 minutes. The official half-life is 3.10m.

Answer 5

Filtration would be used because it is the process of separating mixtures based on the size of their particles
(or pieces). A screen could be used to separate the mixture. The holes in the screen would need to be large
enough to allow the soil to pass through but not the leaves, acorn, or twigs.